water restoration services

Importance of Prompt Response to Water Damage

Importance of Prompt Response to Water Damage


Water damage can be a homeowners worst nightmare. Whether its from a burst pipe, a leaking roof, or a flood, water has the potential to cause extensive damage to your property if not addressed promptly. This is why prompt response to water damage is crucial for effective water restoration services.


When water infiltrates your home, it can seep into walls, floors, and furniture, leading to structural damage and mold growth. The longer water sits, the more damage it can cause, making restoration more difficult and costly. Prompt response is essential to prevent further damage and minimize the impact on your property.


By acting quickly to address water damage, you can help save your belongings and preserve the integrity of your home. Professional water restoration services have the tools and expertise to extract water, dry out affected areas, and restore your property to its pre-damage condition. However, their effectiveness is greatly dependent on how quickly you respond to the situation.


In addition to the physical damage caused by water, there are also health risks associated with prolonged exposure to water-damaged areas. Mold and bacteria can flourish in damp environments, leading to respiratory issues and other health problems. Prompt response to water damage can help mitigate these risks and ensure the safety of you and your family.


Overall, the importance of prompt response to water damage cannot be overstated. By acting quickly, you can prevent further damage, save money on restoration costs, and protect the health and safety of your family. So, if you ever find yourself facing water damage, dont hesitate to call for professional help right away.

Steps in the Water Restoration Process


When it comes to water restoration services, there are several important steps that need to be taken in order to properly address the damage caused by water. The first step is to assess the extent of the damage and determine the best course of action. This may involve extracting any standing water, drying out the affected areas, and removing any damaged materials.


Once the initial assessment has been completed, the next step is to begin the restoration process. This may involve cleaning and sanitizing the affected areas, as well as repairing or replacing any damaged materials. Its important to act quickly in order to prevent further damage and the growth of mold or mildew.


Another important step in the water restoration process is to address any underlying issues that may have contributed to the water damage. This could involve fixing a leaky pipe, repairing a damaged roof, or improving drainage around the property.


Overall, the water restoration process can be complex and time-consuming, but its important to take the necessary steps to properly address the damage and restore your property to its pre-damaged condition. By working with a professional water restoration company, you can ensure that the job is done right and that your property is safe and healthy for you and your family.

Common Causes of Water Damage


Water damage is a common problem that many homeowners face, and it can be caused by a variety of factors. One of the most common causes of water damage is leaking pipes or plumbing fixtures. When pipes or fixtures leak, water can seep into the walls, floors, and ceilings of a home, causing extensive damage over time.


Another common cause of water damage is flooding. Whether its from a burst pipe, heavy rain, or a malfunctioning appliance, flooding can quickly lead to water damage if not addressed promptly. In addition to damaging the structure of a home, flooding can also lead to the growth of mold and mildew, which can pose serious health risks to occupants.


Poorly maintained gutters and downspouts can also contribute to water damage. When gutters become clogged with leaves, dirt, and debris, water can overflow and seep into the foundation of a home, causing damage to the structure and potentially leading to flooding in the basement or crawl space.


Finally, natural disasters such as hurricanes, tornadoes, and severe storms can also cause water damage to homes. In these situations, its important to have a plan in place to protect your home and belongings from water damage, as well as to have a reputable water restoration service on standby to help with cleanup and repairs.


Overall, water damage can be a serious and costly problem for homeowners, but by being proactive and addressing common causes of water damage, you can help protect your home and prevent future issues.

Benefits of Professional Water Restoration Services


When faced with water damage in your home or business, it can be overwhelming to try and handle the cleanup and restoration on your own. Thats where professional water restoration services come in to save the day.


One of the biggest benefits of hiring a professional water restoration company is their expertise and experience in dealing with water damage. They have the knowledge and skills to assess the extent of the damage, determine the best course of action, and efficiently restore your property to its pre-damaged condition.


Professional water restoration services also have the necessary equipment and tools to effectively remove water, dry out the affected areas, and prevent further damage from occurring. They use advanced techniques such as dehumidification, drying, and sanitization to ensure that your property is thoroughly cleaned and restored.


In addition to their technical expertise, professional water restoration services can also help you navigate the complexities of insurance claims. They can work with your insurance company to ensure that you receive the coverage you are entitled to for the water damage restoration services.


Overall, hiring a professional water restoration company can save you time, money, and stress in the long run. They can provide fast and efficient service to minimize the damage to your property and get your life back to normal as quickly as possible. So, next time youre faced with water damage, dont hesitate to call in the experts for professional water restoration services.

Why Heavy Rainfall Causes Basement Flooding in Greenville

Heavy rainfall often leads to basement flooding in Greenville, SC. Many homes in the area face this issue during strong storms. Water enters the basement when the ground, drainage systems, and home structure fail to control excess moisture. Understanding the causes helps homeowners prevent damage and protect their property.

Soil Saturation Increases Water Pressure

Heavy rain saturates the soil around a home. Saturated soil cannot absorb more water. The water builds up around the foundation. This buildup creates hydrostatic pressure. Hydrostatic pressure pushes water through small cracks and joints in basement walls and floors.

Clay-rich soil, which is common in parts of Greenville, absorbs water slowly. It also holds water for a long time. This condition increases pressure against the foundation. As pressure rises, water finds paths into the basement.

Poor Drainage Around the Home

Drainage systems move water away from the home. When drainage fails, water collects near the foundation. Many homes experience drainage problems due to improper grading. The ground should slope away from the house. If the ground slopes toward the house, water flows directly to the foundation.

Clogged or damaged gutters also cause drainage issues. Gutters collect rainwater from the roof. Downspouts carry the water away. If gutters clog with debris, water spills over the sides. This overflow pools near the foundation and increases the risk of flooding.

Foundation Cracks Allow Water Entry

Small cracks in the foundation provide entry points for water. Heavy rainfall increases the amount of water around the home. This increase raises the chance of water entering through these cracks.

Concrete foundations often develop cracks over time. Soil movement, temperature changes, and settling cause these cracks. Even hairline cracks allow water to pass through under pressure. Once water enters, it spreads across the basement floor.

Overloaded Sump Pump Systems

Many Greenville homes use sump pumps to remove water from basements. A sump pump collects water in a pit and pumps it away from the home. During heavy rainfall, the system may become overwhelmed.

If the pump runs continuously, it may fail due to overheating or power loss. If the pump fails, water accumulates quickly in the basement. Homes without backup systems face a higher risk of flooding during strong storms.

High Water Table Levels

The water table refers to the level of groundwater below the surface. Heavy rainfall raises the water table. When the water table rises above the basement floor level, water can seep through the foundation.

This condition often occurs after several days of rain. The ground remains saturated, and groundwater continues to rise. Basements in low-lying areas face a higher risk of this type of flooding.

Stormwater System Limitations

City stormwater systems manage large volumes of rainwater. During intense storms, these systems may reach capacity. When the system cannot handle the volume, water backs up into streets and properties.

This overflow can affect homes with basement drains connected to the municipal system. Water may reverse direction and enter the basement through floor drains or plumbing fixtures.

Improper Waterproofing

Waterproofing systems protect basements from moisture. Some homes lack proper waterproofing. Others have outdated or damaged systems. Without effective waterproofing, water penetrates the foundation more easily.

Exterior waterproofing barriers can degrade over time. Interior sealants may crack or peel. These failures allow water to pass through during heavy rainfall.

Blocked or Broken Drain Tiles

Drain tiles, also known as footing drains, collect water around the foundation. They direct water away from the home. If these drains clog or break, water cannot flow properly.

Roots, soil, and debris often block drain tiles. Broken pipes also prevent proper drainage. When water cannot move away, it builds up around the foundation and increases pressure.

Window Well Flooding

Basement windows often sit below ground level. Window wells protect these windows and allow light into the basement. During heavy rainfall, window wells can fill with water.

If the well does not drain properly, water rises and leaks through the window. Cracks in the window frame or poor seals increase the risk. This issue can cause sudden flooding during storms.

Signs of Basement Flooding Risk

Homeowners should watch for early signs of potential flooding. Damp walls, musty odors, and visible cracks indicate moisture problems. Water stains on walls or floors also signal past water entry.

Pooling water near the foundation after rain suggests poor drainage. Slow drainage in basement floor drains may indicate a blockage. These signs require prompt attention to prevent flooding.

Prevention Methods

Homeowners can take steps to reduce the risk of basement flooding. Proper maintenance and upgrades improve protection during heavy rainfall.

  • Maintain gutters and downspouts. Clean them regularly and extend downspouts away from the home.
  • Improve yard grading. Ensure the ground slopes away from the foundation.
  • Seal foundation cracks. Use appropriate materials to block water entry points.
  • Install or maintain a sump pump. Add a battery backup system for power outages.
  • Inspect and repair drain tiles. Keep them clear of debris and roots.
  • Install window well covers. These covers reduce water buildup during storms.
  • Apply waterproofing systems. Use both interior and exterior solutions for better protection.

Why Professional Help Matters

Heavy rainfall can cause severe basement flooding. Quick action limits damage and reduces repair costs. Professional water restoration services provide fast and effective solutions.

DryDoctors of Greenville, SC offers expert services for water removal and damage repair. Their team uses proper equipment to remove water and dry affected areas. They also identify the source of the problem and recommend long-term solutions.

Conclusion

Heavy rainfall causes basement flooding in Greenville due to soil saturation, poor drainage, and structural weaknesses. Water pressure builds around the foundation and forces water inside. Failing systems and blocked drains increase the risk.

Homeowners can reduce this risk through regular maintenance and proper upgrades. Early detection and quick response protect the home from serious damage. Professional support ensures safe and complete restoration after flooding occurs.

Interior of part of a damaged home in New Orleans after Hurricane Katrina
Family photographs damaged by flooding
A smaller and more minor water spot caused by rainwater leaking through a roof

Water damage describes various possible losses caused by water intruding where it will enable attack of a material or system by destructive processes such as rotting of wood, mold growth, bacteria growth, rusting of steel, swelling of composite woods, damage to laminated materials like plywood, short-circuiting of electrical devices, etc.

The damage may be very slow and minor such as water spots that could eventually mar a surface, or it may be instantaneous and catastrophic such as burst pipes and flooding. However fast it occurs, water damage is a major contributor to loss of property.

An insurance policy may or may not cover the costs associated with water damage and the process of water damage restoration. While a common cause of residential water damage is often the failure of a sump pump, many homeowner's insurance policies do not cover the associated costs without an addendum which adds to the monthly premium of the policy. Often the verbiage of this addendum is similar to "Sewer and Drain Coverage".

In the United States, those individuals who are affected by wide-scale flooding may have the ability to apply for government and FEMA grants through the Individual Assistance program.[1] On a larger level, businesses, cities, and communities can apply to the FEMA Public Assistance program for funds to assist after a large flood. For example, the city of Fond du Lac Wisconsin received $1.2 million FEMA grant after flooding in June 2008. The program allows the city to purchase the water damaged properties, demolish the structures, and turn the former land into public green space.[citation needed]

Health Risks: Mold & Indoor Air Quality

[edit]

Excess moisture from water damage creates ideal conditions for mold growth. Mold colonies can begin to form within 24-48 hours[2] of a wetting event, as porous materials (e.g. drywall) provide both food and shelter for spores. Once established, even small mold patches release spores and microbial fragments into the air, which can trigger a range of respiratory issues. The CDC warns that exposure to damp or moldy indoor environments is associated with increased rates of coughing, wheezing, asthma exacerbations, bronchitis, and hypersensitivity pneumonitis. A 2009 WHO review likewise links persistent indoor dampness and mold to higher prevalences of respiratory symptoms, allergic rhinitis, and asthma across all age groups. Vulnerable populations - particularly children, older adults, and immunocompromised individuals, face the greatest risk of severe reactions, including chronic lung infections in the latter group.

Causes

[edit]

Water damage can originate by different sources such as a broken dishwasher hose, a washing machine overflow, a dishwasher leakage, broken/leaking pipes, flood waters, groundwater seepage, building envelope failures (leaking roof, windows, doors, siding, etc.) and clogged toilets. According to the Environmental Protection Agency, 13.7% of all water used in the home today can be attributed to plumbing leaks.[3] On average that is approximately 10,000 gallons of water per year wasted by leaks for each US home. A tiny, 1/8-inch crack in a pipe can release up to 250 gallons of water a day.[4] According to Claims Magazine in August 2000, broken water pipes ranked second to hurricanes in terms of both the number of homes damaged and the amount of claims (on average $50,000 per insurance claim[citation needed]) costs in the US.[5] Experts suggest that homeowners inspect and replace worn pipe fittings and hose connections to all household appliances that use water at least once a year. This includes washing machines, dishwashers, kitchen sinks, and bathroom lavatories, refrigerator icemakers, water softeners, and humidifiers. A few US companies offer whole-house leak protection systems utilizing flow-based technologies. A number of insurance companies offer policyholders reduced rates for installing a whole-house leak protection system.

As far as insurance coverage is concerned, damage caused by surface water intrusion to the dwelling is considered flood damage and is normally excluded from coverage under traditional homeowners' insurance. Surface water is water that enters the dwelling from the surface of the ground because of inundation or insufficient drainage and causes loss to the dwelling. Coverage for surface water intrusion[6] to the dwelling would usually require a separate flood insurance policy.

[edit]

Global insured losses from floods, storms, and inland water damage reached roughly US $140 billion in 2024, the third-highest annual total on record, with weather-related events accounting for about 97 percent of those losses. Year-over-year claim volumes jumped 15-25 percent in Gulf Coast states, Midwest river corridors, and the Northeast, driven by more intense rainfall and aging infrastructure. In response, insurers are tightening underwriting criteria while offering premium discounts or grants for homes equipped with leak sensors, auto shut-off valves, or reinforced flood barriers. Concurrently, FEMA’s NFIP is modernizing flood maps using forward-looking climate data and revising policy terms to encourage mitigation investments.

Categories

[edit]

There are three basic categories of water damage, based on the level of contamination.

Category 1 Water - Refers to a source of water that does not pose a substantial threat to humans. Examples are broken water supply lines, tub or sink overflows or appliance malfunctions that involve water supply lines.

Category 2 Water - Refers to a source of water that contains a significant degree of chemical, biological or physical contaminants and causes discomfort or sickness when consumed or even exposed to. This type carries microorganisms and nutrients of micro-organisms. Examples are toilet bowls with urine (no feces), sump pump failures, seepage due to hydrostatic failure and water discharge from dishwashers or washing machines.

Category 3 Water is grossly unsanitary. This water contains unsanitary agents, harmful bacteria and fungi, causing severe discomfort or sickness. This category includes water sources from sewage, seawater, rising water from rivers or streams, storm surge, ground surface water or standing water.

Categories of water damage can deteriorate based on environmental conditions, including time and temperature. (e.g., Category 1 water can deteriorate to Category 2 water)

Class of water damage is determined by the potential rate of evaporation based on the type of materials affected by water. For example, carpet pad that is saturated will have a greater potential evaporation rate due to its porosity that a hard wood floor that is saturated with water.

Determing the class of a water loss will help determine how much drying equipment such as air movers and dehumidifiers are required to efficiently dry the structural components.

Class 1 — (least amount of water absorption and evaporation load): Water intrusion where wet, porous materials (e.g., carpet, gypsum board, fiber-fill insulation, concrete masonry unit (CMU), textiles) represent less than ~5% of the combined floor, wall and ceiling surface area in the space; and where materials described as low evaporation materials or assemblies have absorbed minimal moisture (see definitions for Class 4 and low evaporation assemblies).

Class 2 — (significant amount of water absorption and evaporation load): water intrusion where wet, porous materials (e.g., carpet, gypsum board, fiber-fill insulation, concrete masonry unit (CMU), textiles) represent ~5% to ~40% of the combined floor, wall and ceiling surface area in the space; and where materials described as low evaporation materials or assemblies have absorbed minimal moisture (see definitions for Class 4 and low evaporation assemblies).

Class 3 — (greatest amount of water absorption and evaporation load): water intrusion where wet, porous materials (e.g., carpet, gypsum board, fiber-fill insulation, concrete masonry unit (CMU), textiles) represent more than ~40% of the combined floor, wall and ceiling surface area in the space; and where materials described as low evaporation materials or assemblies have absorbed minimal moisture (see definitions for Class 4 and low evaporation assemblies).

Class 4 — (deeply held or bound water): water intrusion that involves a significant amount of water absorption into low evaporation materials (e.g., plaster, wood, concrete, masonry) or low evaporation assemblies (e.g., multilayer wallboard, multilayer subfloors, gym floors, or other complex, built-up assemblies). Drying may require special methods, longer drying times, or substantial water vapor pressure differentials.

Prevention and Mitigation

[edit]

Preventing water damage is far more cost-effective than restoration. Key strategies include:

  1. Moisture control: Dry wet areas within 24 hours and keep indoor relative humidity below 50 percent to inhibit mold growth.
  2. Routine maintenance: Follow a seasonal checklist: clear gutters in spring, inspect roof flashings in summer, winterize sprinklers in fall, and run faucets at a trickle during deep freezes, to prevent common failure points.
  3. Smart technology: Install IoT leak sensors under sinks or behind appliances and automatic shut-off valves on main lines to detect and stop leaks before they spread.
  4. Climate-resilient landscaping: Grade soil away from foundations and install French drains or gravel trenches in persistently wet zones.

These measures can cut water damage incidents by up to 30 percent in proactive households and may qualify homeowners for insurance premium credits under emerging resilience incentive programs.

Restoration

[edit]

Water damage restoration can be performed by property management teams, building maintenance personnel, or by the homeowners themselves; however, contacting a certified professional water damage restoration specialist is often regarded as the safest way to restore water damaged property. Certified professional water damage restoration specialists utilize psychrometrics to monitor the drying process.[7]

Cost and Insurance Implications

[edit]

Restoration costs vary widely depending on water contamination and the extent of damage. According to Angi’s 2025 data, average cleanup ranges from about US $450-$1,200 for minor (Category 1/Class 1) incidents to $5,000-$16,000+ for severe (Category 3/Class -4) events, with a nationwide average around $3,833 and typical rates of $3-$7.50 per square foot. Costs rise steeply for gray or black water and prolonged exposure, due to additional demolition, antimicrobial treatments, and reconstruction.

Homeowners insurance coverage differs by policy type. A standard HO-3 policy generally covers sudden internal water damage (e.g., burst pipes) but excludes flood losses, which require a separate NFIP or private flood policy. NFIP building and contents coverages carry separate deductibles, often in the $1,000-$1,500 range, and have specific waiting periods before claims can be made. Policyholders with replacement cost coverage receive full new-for-old compensation (minus deductible), whereas actual cash value policies only reimburse depreciated value of damaged items.

When filing a claim, insurers recommend: stop the water source and document damage with photos and moisture readings; report the loss promptly via the insurer’s 24/7 claims line; save all repair and lodging receipts; and use professional drying logs to substantiate remediation work for the adjuster.

Standards and regulation

[edit]

While there are currently no government regulations in the United States dictating procedures, The Institute of Inspection Cleaning and Restoration Certification (IICRC)[8] is the industry standards and certifying body. The current IICRC standard is ANSI/IICRC S500-2021.[9] It is the collaborative work of the IICRC, SCRT, IEI, IAQA, and NADCA.

License and Certification

[edit]

Water Restoration companies are regulated by the appropriate state's Department of Consumer Affairs - usually the state contractors license board. While there are generally no contractors license classifications for water damage restoration, the work performed during a restoration project is often covered in adjacent license classifications.

When consumers or businesses hire water restoration companies, they should ensure they are a reputable company by checking reviews, verifying any applicable contractors licenses, IICRC certifications, if they are an IICRC Certified Firm,[10] and appropriate business insurance.

Procedures

[edit]
  1. Assessment and Moisture Mapping: Technicians use moisture meters and infrared imaging to locate hidden water intrusion and record the appropriate Category/Class ratings before remediation begins.
  2. Water Extraction: High-capacity pumps and truck-mounted vacuums remove standing water. Clean Category 1 water is discharged to sanitary drains, while gray/black water is contained for proper disposal.
  3. Structural Drying: Air movers and dehumidifiers are strategically placed and adjusted daily, creating a controlled drying environment. Class 4 projects (deeply soaked materials) may require tenting to concentrate warm, dry airflow on saturated structural elements.
  4. Monitoring and Documentation: Hygrometers and thermal probes gauge moisture levels every 24 hours. Detailed logs and moisture maps are provided to insurers to substantiate drying progress and accelerate claim approvals.
  5. Repairs and Reconstruction: Once materials meet the “dry standard,” technicians rebuild affected areas-replacing drywall, flooring, and finishes and perform a final walkthrough with the client, often backed by a limited workmanship warranty.

See also

[edit]

References

[edit]
  1. ^ "Individual Disaster Assistance". DisasterAssistance.gov. Retrieved 2009-09-28.
  2. ^ US EPA, OAR. "Mold Course Chapter 2:". 19january2017snapshot.epa.gov. Retrieved 2025-07-22.
  3. ^ "How We Use Water". 16 January 2017.
  4. ^ The University of Maine Corporate Extension – www.umext.maine.edu
  5. ^ Herndon Jr., Everette L.; Yang, Chin S. (August 2000). "Mold & Mildew: A Creeping Catastrophe". Claims Magazine. Archived from the original on 2000-08-15. Retrieved November 4, 2016.
  6. ^ Moisture Control Guidance for Building Design, Construction and Maintenance. December 2013.
  7. ^ "Chapter 6: Psychrometry and the Science of Drying". IICRC Standards Subscription Site. Institute of Inspection, Cleaning and Restoration Certification. Retrieved 27 September 2020.
  8. ^ "Institute of Inspection Cleaning and Restoration Certification".
  9. ^ "ANSI/IICRC S500 Water Damage Restoration". IICRC. 22 December 2020. Retrieved 14 February 2022.
  10. ^ "IICRC Certified Firm".

 

Pumps being used to dewater a spillway at Baldhill Dam

Dewatering /diːˈwɔːtərɪŋ/ is the removal of water from a location. This may be done by wet classification, centrifugation, filtration, or similar solid-liquid separation processes, such as removal of residual liquid from a filter cake by a filter press as part of various industrial processes.[1]

Construction dewatering, unwatering, or water control are common terms used to describe removal or draining groundwater or surface water from a riverbed, construction site, caisson, or mine shaft, by pumping or evaporation. On a construction site, this dewatering may be implemented before subsurface excavation for foundations, shoring, or cellar space to lower the water table. This frequently involves the use of submersible "dewatering" pumps, centrifugal ("trash") pumps, eductors, or application of vacuum to well points. The international business research company Visiongain valued the global dewatering pump market at $6.4 billion in 2018.[2]

Processes

[edit]

Deep wells

[edit]
A deep well used to dewater locks at Sault Ste. Marie, Michigan
River crossing dewatering in Mine site

A deep well typically consists of a borehole fitted with a slotted liner and an electric submersible pump. As water is pumped from a deep well, a hydraulic gradient is formed and water flows into the well forming a cone of depression around the well in which there is little or no water remaining in the pore spaces of the surrounding soil. Deep wells work best in soils with a permeability of k = 10−3 m/s to 10−5 m/s; the amount of drawdown that a well can achieve is limited only by the size of the fish pump.[3]

Deep wells can be installed in a ring around an excavation to lower the water level and maintain a safe, dry site. Several equations can be used to design deep well dewatering systems, however many of these are based on empirical data and occasionally fail. Practice and experience, along with a firm understanding of the underlying principles of dewatering, are the best tools for designing a successful system.[4] Some dewatering situations "are so common that they can be designed almost by rule of thumb".[5]

Deep wells are also used for aquifer testing and for groundwater drainage by wells.[6]

Wellpoints

[edit]
A cofferdam created to allow for dewatering of an area

Wellpoints are small-diameter (about 50 mm) tubes with slots near the bottom that are inserted into the ground from which water is drawn by a vacuum generated by a dewatering piston pump. Wellpoints are typically installed at close centers in a line along or around the edge of an excavation. As a vacuum is limited to 0 bar, the height to which water can be drawn is limited to about 6 meters (in practice).[7] Wellpoints can be installed in stages, with the first reducing the water level by up to five meters, and a second stage, installed at a lower level, lowering it further. The water trickling between the deep wells may be collected by a single row of well point at the toe. This method ensures a much thicker width free from seepage forces.

Wellpoint spears are generally used to draw out groundwater in sandy soil conditions & rock condition and are not as effective in clay . Open pumps are sometimes used instead of spears if the ground conditions contain significant clay .[8]

Horizontal drainage

[edit]
Dewatering of sludge in a wastewater treatment plant

The installation of horizontal dewatering systems is relatively easy.[9] A trencher installs an unperforated pipe followed by a synthetic or organic wrapped perforated pipe. The drain length is determined by the drain diameter, soilconditions and the water table. In general drain lengths of 50 meters is common. After installation of the drainpipe a pump is connected to the drain. After the water table has been lowered, the intended construction can start. After the construction is finished the pumps are stopped, and the water table will rise again. Installation depths up to 6 meters are common.

Control of pore pressures

[edit]

Whilst engineers can use dewatering to lower a groundwater table, or to drain soils, they can also use the process to control pore pressure in soils and avoid damage to structures by base heave. High pore pressures occur in soils composed of fine silts or clays. Since these soils have a very low permeability, dewatering in a traditional sense (gravity flow into an abstraction well) may prove very costly or even futile. Instead, a vacuum-assisted dewatering scheme, such as ejector wells, or vacuum-sealed deep wells may serve to draw water into a well for abstraction.[10]

Applications

[edit]

Construction

[edit]

Dewatering is often a critical component of construction projects. Dewatering of a site improves safety by preventing the formation of mud and eliminating hazards to electrical equipment posed by water. Removing water also improves the stability of soils and mitigates erosion.[11]

Wastewater treatment

[edit]

In wastewater treatment, dewatering may be used to remove solids during the treatment process for separate disposal. This may take the form of thickening, where only some of the water is removed, or full dewatering.[12]

See also

[edit]

References

[edit]
  1. ^ Alimohammadi, Masoumeh; Tackley, Hayden; Holmes, Baillie; Davidson, Kirklyn; Lake, Craig B.; Spooner, Ian S.; Jamieson, Rob C.; Walker, Tony R. (2020). "Characterising sediment physical property variability for bench-scale dewatering purposes". Environmental Geotechnics: 1–9. doi:10.1680/jenge.19.00214. S2CID 225315568.
  2. ^ ""Global Dewatering Pump Market to be valued at $6.4 billion in 2018" reports Visiongain". Visiongain. 5 September 2019. Retrieved 5 September 2019.
  3. ^ CIRIA515 Groundwater control – design and practice. Spon. London. 2000.
  4. ^ The design of groundwater control systems using the observational method. TOL Roberts and M Preene. Geotechnique 44, No. 4, 727–34, December 1994.
  5. ^ On the analysis of dewatering systems. JK White. Proceedings of the Xth International Conference of Soil Mechanics and Foundation Engineering, June 1981.
  6. ^ ILRI, 2000, Subsurface drainage by (tube)wells: Well spacing equations for fully and partially penetrating wells in uniform or layered aquifers with or without anisotropy and entrance resistance, 9 pp. Principles used in the "WellDrain" model. International Institute for Land Reclamation and Improvement (ILRI), Wageningen, The Netherlands. On line: [1] . Free download "WellDrain" software from web page : [2], or from : [3]
  7. ^ The adaptable wellpoint. JK White. Water Services, May 1982.
  8. ^ Civil Assist Australia. 2014. Complete Water Table Management. [ONLINE] Available at: http://civilassistaustralia.com.au/service/ground-water-control/ Archived 2 April 2015 at the Wayback Machine. [Accessed 03 March 15]
  9. ^ ILRI, 2000, The energy balance of groundwater flow applied to sububsurface drainage by pipes or ditches in anisotropic soils with entrance resistance: drain spacing equations., 18 pp. Principles used in the "EnDrain" model. International Institute for Land Reclamation and Improvement (ILRI), Wageningen, The Netherlands. On line: [4] Archived 19 February 2009 at the Wayback Machine . Free download of "EnDrain" software from web page : [5], or from : [6]
  10. ^ Roberts, T.O.L.; Roscoe, H.; Powrie, W.; Butcher, D.J.E. (2007). "Controlling clay pore pressures for cut-and-cover tunneling". Proceedings of the Institution of Civil Engineers - Geotechnical Engineering. 160 (4): 227–236. Bibcode:2007ICEGE.160..227R. doi:10.1680/geng.2007.160.4.227. ISSN 1353-2618.
  11. ^ Ruiz, Angelina (29 December 2020). "Dewatering and Discharge Challenges in Construction Projects and Solutions". Waste Advantage Magazine. Retrieved 24 September 2022.
  12. ^ Ministry of the Environment, Conservation and Parks (29 March 2019). "Design Guidelines for Sewage Works: Sludge thickening and dewatering". ontario.ca. Retrieved 24 September 2022.

Further reading

[edit]
  • Erdmann, Wilfried; Emanuel RomaÅ„czyk (1995). "International State of the Art and Tendencies in the Fields of Thickening and Dewatering". In Wieslaw Blaschke (ed.). New Trends in Coal Preparation Technologies and Equipment. Gordon and Breach Publishers. pp. 89–93. ISBN 978-2-88449-139-6. OCLC 60279792. Retrieved 15 May 2009.
  • Powers, J. Patrick (1992). Construction dewatering: new methods and applications. New York City: John Wiley & Sons. ISBN 0-471-60185-3. OCLC 24502054. Retrieved 15 May 2009.
  • Spellman, Frank R. (1997). Dewatering Biosolids. Boca Raton, Florida: CRC Press. ISBN 1-56676-483-1. OCLC 36556585. Retrieved 15 May 2009.
  • Svarovsky, Ladislav (2000). Solid-liquid separation. Oxford: Butterworth-Heinemann. p. 3. ISBN 0-7506-4568-7. OCLC 45103009.
  • TurovskiÄ­, I. S.; P.K. Mathai (2006). "Dewatering". Wastewater sludge processing. Hoboken, New Jersey: John Wiley & Sons. pp. 106–135. ISBN 0-471-70054-1. OCLC 61821712. Retrieved 15 May 2009.