Dewatering Pump Market Size, Share, Growth, and Industry Analysis, By Type (Submersible Dewatering Pumps, Non-submersible Dewatering Pumps), By Application (Construction and Agriculture, Oil and Gas, Municipal, Mineral and Mining, Others), Regional Insights and Forecast to 2035
Dewatering Pump Market Overview
The global Dewatering Pump Market size estimated at USD 8456.46 million in 2026 and is projected to reach USD 13626.53 million by 2035, growing at a CAGR of 5.44% from 2026 to 2035.
The Dewatering Pump Market is witnessing steady expansion due to increasing construction projects, mining operations, infrastructure rehabilitation, industrial wastewater management, and municipal water handling requirements. Dewatering pumps are widely used to remove groundwater, stormwater, sludge, and contaminated liquids from excavation sites, tunnels, quarries, and industrial facilities. More than 68% of large-scale infrastructure projects globally require temporary or permanent dewatering systems during construction. Electrically powered pumps account for approximately 57% of installed units, while diesel-powered pumps remain essential for remote locations with nearly 43% deployment.
The United States remains one of the largest contributors to the Dewatering Pump Market due to continuous investments in transportation infrastructure, municipal wastewater modernization, mining, oil and gas operations, and flood management programs. More than 52,000 active construction projects annually require temporary dewatering solutions, while over 16,000 municipal wastewater treatment facilities depend on dewatering pumps for sludge handling and water transfer operations. Approximately 39% of the country's demand originates from infrastructure construction, followed by mining and quarrying at nearly 18%.
Download Free Sample to learn more about this report.
Key Findings
- Market Size & Growth: Construction applications account for approximately 36% of total demand, mining contributes around 31%, municipal utilities represent nearly 21%, and industrial manufacturing accounts for approximately 12% of overall equipment deployment globally.
- Key Market Driver: Increasing infrastructure development contributes nearly 42% of overall equipment demand, while urban drainage modernization projects account for approximately 29%. Mining expansion supports around 18%, and flood management investments contribute nearly 11% to new dewatering pump installations worldwide.
- Major Market Restraint: Maintenance costs influence nearly 34% of purchasing decisions, fuel price volatility affects approximately 26% of diesel-powered operations, equipment downtime impacts around 21%, and corrosion-related component replacement contributes nearly 19% of operational challenges.
- Emerging Trends: Smart pump monitoring systems are being integrated into approximately 38% of new installations, energy-efficient motors represent nearly 41% of equipment demand, remote monitoring adoption exceeds 27%, while variable frequency drive integration reaches approximately 32% across industrial applications.
- Regional Leadership: Asia-Pacific accounts for approximately 45% of global equipment deployment, North America represents nearly 26%, Europe contributes around 20%, while the Middle East & Africa and Latin America collectively account for approximately 9% of total installations.
- Competitive Landscape: The leading manufacturers collectively control approximately 49% of market presence, mid-sized regional suppliers account for nearly 33%, while specialized industrial pump manufacturers contribute around 18% through customized dewatering equipment and rental solutions.
- Market Segmentation: Submersible dewatering pumps represent approximately 46% of installations, centrifugal pumps account for nearly 28%, diaphragm pumps contribute around 15%, while other specialized dewatering technologies collectively represent approximately 11% of total market demand.
- Recent Development: Approximately 36% of newly introduced products feature digital monitoring capabilities, 31% include energy-efficient motor technologies, 19% emphasize corrosion-resistant materials, while nearly 14% incorporate automated performance optimization for industrial and municipal applications.
Dewatering Pump Market Latest Trends
The Dewatering Pump Market Trends continue to evolve with the growing adoption of intelligent pumping systems, energy-efficient motors, and automated monitoring technologies across construction, mining, municipal, and industrial applications. Nearly 38% of newly installed pumps now feature digital monitoring capabilities that improve operational efficiency and predictive maintenance. Variable frequency drive systems have been integrated into approximately 32% of industrial pump installations to reduce energy consumption and improve flow control. Submersible pump demand has increased significantly, representing nearly 46% of total equipment installations due to higher efficiency in underground and confined-space operations.
Environmental compliance requirements continue influencing equipment design, encouraging manufacturers to introduce corrosion-resistant materials, low-noise motors, and improved hydraulic efficiency. Approximately 41% of industrial buyers now prioritize energy-efficient pumping systems, while nearly 35% seek remote monitoring capabilities to minimize maintenance costs. Portable dewatering units account for almost 47% of equipment deployed during emergency flood response and temporary construction activities. Hybrid power systems combining electric and diesel technologies have experienced adoption exceeding 17%, particularly in remote infrastructure projects. These developments continue strengthening the Dewatering Pump Market Forecast, Dewatering Pump Market Insights, Dewatering Pump Market Analysis, Dewatering Pump Market Research Report, Dewatering Pump Market Growth, Market Share, and Market Opportunities across global B2B industries.
Dewatering Pump Market Dynamics
DRIVER
"Growing Infrastructure Development and Mining Activities"
Large-scale infrastructure expansion remains the primary driver of the Dewatering Pump Market Growth. More than 42% of worldwide demand is generated by transportation infrastructure, commercial construction, and urban development projects requiring groundwater removal before foundation work begins. Mining operations contribute approximately 31% of equipment utilization due to continuous excavation, pit drainage, and underground water management requirements. Around 68% of tunnel and bridge construction projects require high-capacity dewatering systems throughout multiple construction phases.
RESTRAINTS
"High Maintenance Requirements and Operating Costs"
Maintenance complexity and operating expenses remain significant restraints for the Dewatering Pump Market. Nearly 34% of industrial operators identify maintenance costs as a major purchasing concern, particularly in abrasive mining and wastewater environments. Diesel-powered equipment experiences approximately 26% higher operating expenses because of fluctuating fuel prices and regular servicing requirements.
OPPORTUNITY
"Expansion of Smart Pumping Technologies and Flood Management Projects"
Growing adoption of digital monitoring technologies and investments in flood control infrastructure create significant opportunities for the Dewatering Pump Market. Approximately 38% of newly installed dewatering systems now incorporate remote monitoring and predictive maintenance capabilities, improving operational efficiency and reducing unexpected failures. Nearly 41% of industrial buyers prioritize energy-efficient pumping systems equipped with variable frequency drives for optimized performance.
CHALLENGE
"Supply Chain Disruptions and Equipment Standardization Issues"
Supply chain disruptions and increasing demand for customized pumping solutions remain key challenges for the Dewatering Pump Market. Nearly 32% of manufacturers report extended lead times for motors, control systems, and specialized pump components. Approximately 24% of industrial projects require customized pump configurations that increase engineering complexity and production schedules. Global shortages of electronic control components affect around 18% of advanced smart pumping systems, delaying project completion.
Dewatering Pump Market Segmentation
The Dewatering Pump Market is segmented by type and application to address diverse operational requirements across construction, mining, municipal, industrial, agriculture, and emergency flood management sectors. By type, the market includes Submersible Dewatering Pumps and Non-submersible Dewatering Pumps, each designed for specific operating environments and discharge capacities. By application, demand is primarily generated from construction, mining, wastewater treatment, industrial processing, and flood control projects.
Download Free Sample to learn more about this report.
BY TYPE
Submersible Dewatering Pumps: Submersible dewatering pumps represent the largest product category within the Dewatering Pump Market because of their ability to operate directly underwater while delivering continuous, efficient, and reliable pumping performance. These pumps account for approximately 46% of total global installations due to their extensive use in underground construction, mining shafts, tunnels, wastewater treatment plants, quarries, and flood management operations. Their sealed motor construction minimizes contamination while improving operational safety in submerged conditions. Nearly 58% of underground excavation projects utilize submersible pumps because they eliminate suction limitations associated with surface-mounted systems.
Non-submersible Dewatering Pumps: Non-submersible dewatering pumps remain essential for high-capacity surface pumping applications where equipment must operate outside the liquid source. These pumps account for approximately 54% of installed pumping capacity by discharge volume despite representing a smaller proportion of unit installations, as they are frequently selected for large infrastructure, irrigation, industrial processing, and open-pit mining projects requiring higher flow rates. Nearly 43% of diesel-powered dewatering systems utilize non-submersible configurations because they provide superior mobility across remote construction and mining locations.
BY APPLICATION
Construction and Agriculture: Construction and agriculture represent one of the largest application segments in the Dewatering Pump Market because both industries require continuous removal of groundwater, rainwater, and accumulated surface water to maintain safe and productive operations. Construction activities account for approximately 36% of total dewatering pump demand worldwide. Excavation for highways, bridges, tunnels, metro systems, commercial buildings, dams, and residential foundations depends on dewatering pumps to stabilize soil and prevent structural damage. Nearly 68% of deep excavation projects require temporary groundwater control before concrete placement. Portable dewatering pumps are used in approximately 52% of infrastructure projects because they can be relocated easily as construction progresses.
Oil and Gas: The oil and gas sector is a major application area for dewatering pumps due to continuous requirements for groundwater removal, drilling site drainage, refinery water handling, and wastewater management. Approximately 18% of global dewatering pump demand originates from upstream, midstream, and downstream operations. During drilling and well construction, pumps remove accumulated water to maintain safe working conditions and protect drilling equipment. More than 42% of onshore drilling sites utilize portable diesel-powered dewatering pumps because of their ability to operate in remote environments. Surface-mounted centrifugal pumps account for nearly 48% of installations within exploration activities owing to their high discharge capacity.
Municipal: Municipal utilities constitute an essential application segment within the Dewatering Pump Market due to growing investments in wastewater treatment, stormwater drainage, sewer maintenance, and flood management infrastructure. Approximately 21% of worldwide dewatering pump demand is generated by municipal water authorities. More than 16,000 municipal wastewater treatment facilities in developed economies depend on dewatering pumps for sludge transfer and drainage operations. Stormwater management projects account for nearly 39% of municipal procurement activity, particularly in flood-prone urban regions. Portable pumps are widely deployed during emergency flooding events, representing approximately 44% of municipal emergency response equipment.
Mineral and Mining: Mineral and mining operations represent one of the fastest-growing application segments because excavation cannot proceed efficiently without continuous groundwater removal. Mining contributes approximately 31% of total global dewatering pump demand, making it one of the largest industrial users. Open-pit mines require continuous pit drainage to maintain safe operating conditions, while underground mines depend on high-pressure pumps to remove infiltrating groundwater. Nearly 61% of underground mining operations operate multiple dewatering systems simultaneously throughout extraction activities. High-capacity pumps capable of handling abrasive slurry are utilized in approximately 47% of mining applications.
Others: The "Others" application category includes industrial manufacturing, power generation, marine operations, chemical processing, disaster management, commercial facilities, and wastewater recycling projects. Together these sectors account for approximately 15% of total dewatering pump demand worldwide. Manufacturing plants use dewatering pumps for equipment maintenance, cooling water management, and production wastewater handling. Nearly 28% of industrial facilities install permanent drainage systems to minimize operational interruptions caused by water accumulation. Power generation facilities utilize pumps during maintenance shutdowns and cooling infrastructure inspections, representing approximately 17% of demand within this application category.
Dewatering Pump Market Regional Outlook
The Dewatering Pump Market demonstrates strong regional diversification, supported by infrastructure construction, mining expansion, industrial water management, municipal wastewater treatment, and flood control investments. Asia-Pacific leads the global market with approximately 45% of total market share owing to extensive construction activities, urbanization, and mining operations. North America accounts for nearly 26% of the market due to advanced infrastructure rehabilitation, municipal drainage modernization, and oil and gas developments.
Download Free Sample to learn more about this report.
NORTH AMERICA
North America accounts for approximately 26% of the global Dewatering Pump Market share, making it the second-largest regional market. The region benefits from continuous investments in transportation infrastructure, municipal wastewater systems, mining operations, flood management, and oil and gas exploration. More than 52,000 construction projects annually require temporary or permanent dewatering systems during excavation and foundation development. Approximately 39% of regional demand originates from infrastructure construction, while municipal utilities contribute nearly 24%, mining accounts for around 18%, and industrial manufacturing represents approximately 11%. Portable dewatering pumps comprise almost 47% of equipment deployed because of their flexibility across construction and emergency flood response operations. Electrically powered systems account for approximately 58% of installations due to increasing emphasis on energy efficiency and reduced emissions. Nearly 34% of newly installed pumps incorporate remote monitoring and predictive maintenance technologies. Municipal drainage modernization projects continue expanding across urban centers, while severe weather events have increased demand for emergency pumping equipment by approximately 22%.
EUROPE
Europe represents approximately 20% of the global Dewatering Pump Market share and remains one of the most technologically advanced regional markets. Demand is driven by wastewater treatment modernization, underground transportation projects, renewable energy developments, mining activities, and strict environmental regulations governing water management. Municipal applications account for nearly 34% of regional equipment demand, while construction contributes approximately 31%, industrial manufacturing represents around 20%, and mining accounts for nearly 15%. More than 61% of newly installed pumps are electric-powered due to regional sustainability objectives and reduced operating emissions. Smart pumping technologies equipped with remote diagnostics and predictive maintenance capabilities account for approximately 37% of recent installations. Flood prevention infrastructure projects continue expanding across several European countries, increasing procurement of portable and permanent dewatering systems. Approximately 44% of municipal drainage upgrades involve replacement of aging pumping equipment with energy-efficient alternatives.
GERMANY Dewatering Pump Market
Germany accounts for approximately 28% of the European Dewatering Pump Market, making it the largest national market within the region. Strong industrial manufacturing, advanced wastewater infrastructure, transportation construction, and environmental engineering continue driving equipment demand. Nearly 36% of domestic demand originates from industrial facilities requiring reliable drainage and wastewater handling systems, while construction contributes approximately 30%. Municipal wastewater treatment facilities represent nearly 22% of equipment installations, supported by continuous modernization of urban drainage infrastructure. More than 63% of newly installed dewatering pumps are electrically powered, reflecting Germany's focus on energy-efficient industrial equipment. Approximately 39% of new procurement includes digital monitoring technologies for predictive maintenance and remote operation. Flood prevention initiatives and river management projects have expanded procurement of portable pumping systems by nearly 19%.
UNITED KINGDOM Dewatering Pump Market
The United Kingdom accounts for approximately 19% of the European Dewatering Pump Market and maintains strong demand through infrastructure upgrades, flood protection programs, wastewater management, and commercial construction activities. Construction projects generate nearly 35% of domestic equipment demand, while municipal drainage and wastewater treatment contribute approximately 29%. Industrial manufacturing represents around 18%, and infrastructure maintenance accounts for nearly 18% of market activity. More than 54% of installed systems utilize submersible pump technology because of widespread applications in underground construction and sewer maintenance. Approximately 33% of newly installed pumps incorporate remote monitoring capabilities to improve maintenance planning and equipment reliability. Government investments in flood resilience continue increasing procurement of portable pumping systems, particularly in coastal and river basin regions. Energy-efficient electric pumps account for nearly 60% of new installations, replacing aging diesel-powered equipment across municipal utilities and construction projects.
ASIA-PACIFIC
Asia-Pacific holds approximately 45% of the global Dewatering Pump Market share, making it the largest regional market due to extensive infrastructure development, rapid urbanization, mining expansion, industrial manufacturing growth, and increasing investments in municipal water management. Construction activities contribute nearly 38% of regional equipment demand, while mining accounts for approximately 29%, municipal wastewater management represents around 18%, and industrial processing contributes nearly 15%. More than 64% of large-scale transportation projects, including highways, metro rail systems, tunnels, and airports, utilize temporary or permanent dewatering systems during excavation and foundation works. Electric-powered pumps account for approximately 56% of regional installations, while diesel-powered systems continue serving remote mining and infrastructure locations with nearly 44% deployment. Around 41% of newly installed pumping systems feature automated monitoring and intelligent control technologies for predictive maintenance and operational optimization. Flood mitigation projects across coastal cities have increased portable pump procurement by approximately 24%, while smart drainage modernization programs contribute nearly 21% of municipal purchases.
JAPAN Dewatering Pump Market
Japan accounts for approximately 16% of the Asia-Pacific Dewatering Pump Market and remains a technologically advanced market characterized by high adoption of energy-efficient pumping systems and intelligent water management solutions. Municipal wastewater treatment contributes nearly 34% of domestic demand, while infrastructure maintenance accounts for approximately 28%, industrial manufacturing represents around 23%, and construction projects contribute nearly 15%. More than 67% of newly installed dewatering pumps utilize electric motors with high-efficiency performance standards. Approximately 42% of recent equipment installations include digital monitoring systems capable of predictive maintenance and remote diagnostics. Underground transportation projects, tunnel rehabilitation, and flood protection infrastructure continue driving procurement of compact submersible pumps. Around 53% of urban drainage facilities have upgraded pumping equipment with automated control systems to improve operational reliability. Industrial facilities increasingly deploy corrosion-resistant pumps for wastewater handling and manufacturing operations.
CHINA Dewatering Pump Market
China represents approximately 48% of the Asia-Pacific Dewatering Pump Market, making it the largest country-level contributor in the region. Large-scale infrastructure construction, urban expansion, mining operations, and industrial manufacturing continue driving strong equipment demand. Construction projects account for nearly 41% of domestic demand, while mining contributes approximately 31%, municipal wastewater management represents around 17%, and industrial applications account for nearly 11%. More than 72% of major transportation and urban development projects require dewatering systems during excavation and underground construction. Electric-powered pumps comprise approximately 54% of installations, while diesel-powered equipment remains widely utilized in mining and remote infrastructure projects. Nearly 37% of newly commissioned pumping systems incorporate intelligent monitoring and automated performance management technologies. Municipal flood control initiatives have increased procurement of high-capacity portable pumps by approximately 26%.
MIDDLE EAST & AFRICA
The Middle East & Africa account for approximately 4% of the global Dewatering Pump Market share and continue experiencing steady expansion through investments in infrastructure construction, mining operations, desalination facilities, industrial developments, and flood management systems. Mining contributes nearly 33% of regional demand, construction represents approximately 29%, municipal water infrastructure accounts for around 20%, while oil and gas operations contribute nearly 18%. More than 58% of mining projects utilize heavy-duty dewatering pumps for groundwater removal and pit drainage throughout extraction activities. Diesel-powered equipment accounts for approximately 49% of installations because many operating locations remain remote from electrical infrastructure, while electric-powered systems represent nearly 51% of urban installations. Around 27% of newly procured pumps feature remote monitoring capabilities to improve operational efficiency and maintenance scheduling. Desalination facilities and wastewater treatment plants continue expanding across several countries, increasing demand for corrosion-resistant pumping systems capable of handling saline water and industrial liquids.
List of Key Dewatering Pump Market Companies
- Grundfos
- Sulzer
- Xylem
- The Weir Group
- KSB
- Ebara
- Wacker Neuson
- Tsurumi Pump
- Zoeller Pumps
- Honda Power Equipment
- Mersino Dewatering
- Nanfang Pump Industry
- Zhejiang EO Pump
- Veer Pump
Top Two Companies with Highest Share
- Xylem: Holds approximately 12% share due to strong adoption of advanced water management, municipal drainage, and industrial dewatering solutions across global markets.
- Grundfos: Accounts for nearly 10% share supported by energy-efficient pumping technologies, smart monitoring systems, and widespread industrial and commercial applications.
Investment Analysis and Opportunities
The Dewatering Pump Market presents attractive investment opportunities due to increasing infrastructure development, mining expansion, municipal water management, and climate resilience projects. Approximately 42% of new investment activity is focused on advanced energy-efficient pumping systems designed to reduce operational costs and improve performance. Construction and infrastructure projects represent nearly 36% of total investment opportunities as urban expansion, transportation development, and underground construction require reliable groundwater management solutions. Mining applications contribute around 31% of investment potential because companies continue upgrading high-capacity pumps for open-pit and underground operations.
Regional investment opportunities are expanding across Asia-Pacific, North America, and Europe due to modernization of wastewater infrastructure and increasing environmental requirements. Asia-Pacific represents approximately 45% of market opportunities because of large-scale construction projects, industrial growth, and mining activities. North America contributes nearly 26% through infrastructure rehabilitation, flood management programs, and municipal upgrades. Around 41% of manufacturers are investing in product improvements focused on energy efficiency, corrosion resistance, and digital connectivity. Hybrid power solutions represent approximately 17% of emerging investment opportunities, particularly for remote mining and infrastructure projects.
New Products Development
New product development in the Dewatering Pump Market is increasingly focused on smart technologies, improved energy efficiency, enhanced durability, and application-specific designs. Approximately 38% of newly introduced dewatering pumps feature digital monitoring capabilities that allow operators to track performance, detect failures, and optimize maintenance schedules. Energy-efficient motor technologies are incorporated into nearly 41% of new product launches to reduce power consumption and improve operational reliability. Manufacturers are developing advanced submersible pumps with improved sealing systems, corrosion-resistant materials, and high-solids handling capabilities for demanding mining and wastewater applications.
Product innovation is also focused on portable and modular dewatering solutions designed for construction sites, emergency flood response, and remote industrial operations. Approximately 36% of newly developed systems emphasize compact designs, easier transportation, and faster installation capabilities. Hybrid pumping technologies account for nearly 17% of emerging product development activities, combining electric and fuel-based operation for flexible deployment. Manufacturers are also improving automated control systems, with approximately 34% of advanced models incorporating remote operation features. Lightweight materials, improved hydraulic efficiency, and noise reduction technologies are becoming important development priorities, particularly for urban construction and municipal applications.
Five Recent Developments
- New Smart Dewatering Pump Systems: In 2024, manufacturers introduced advanced dewatering pump models with integrated digital monitoring and remote control capabilities. Nearly 36% of newly launched systems included smart sensors for real-time performance tracking, fault detection, and predictive maintenance.
- Energy-Efficient Pump Technology Upgrades: In 2024, leading manufacturers focused on developing energy-saving dewatering pumps equipped with high-efficiency motors and optimized hydraulic designs. Approximately 41% of new product developments emphasized reduced power consumption and improved operational performance.
- Advanced Submersible Pump Innovations: Manufacturers launched improved submersible dewatering pumps in 2024 featuring enhanced sealing systems, corrosion-resistant materials, and higher solids-handling capabilities. Nearly 38% of new submersible product introductions targeted mining, wastewater, and construction applications requiring reliable underwater operation.
- Portable Dewatering Equipment Expansion: In 2024, companies expanded their portable dewatering pump portfolios to address increasing demand from emergency response, construction, and temporary drainage projects. Approximately 29% of new product launches focused on lightweight, mobile pumping solutions with faster installation features.
- Hybrid and Automated Pumping Solutions: In 2024, manufacturers increased development of hybrid-powered and automated dewatering systems designed for remote industrial applications. Nearly 17% of emerging product innovations incorporated hybrid power capabilities, while approximately 34% included automated control functions.
Report Coverage of Dewatering Pump Market
The Dewatering Pump Market report provides comprehensive coverage of key market segments, including product types, applications, regional performance, competitive landscape, technological developments, and industry trends. The report analyzes major pump categories such as submersible dewatering pumps and non-submersible dewatering pumps, which collectively represent 100% of product demand. Submersible pumps account for approximately 46% of installations due to their extensive use in construction, mining, wastewater, and flood management applications, while non-submersible systems contribute nearly 54% of installed pumping capacity.
Regional analysis included in the Dewatering Pump Market coverage evaluates Asia-Pacific, North America, Europe, and Middle East & Africa markets. Asia-Pacific represents approximately 45% of global market share, followed by North America with nearly 26%, Europe with around 20%, and Middle East & Africa contributing approximately 4%. The report also examines technological advancements, where approximately 38% of new systems include smart monitoring capabilities and nearly 41% incorporate energy-efficient motor technologies. Competitive analysis covers leading manufacturers, product innovations, investment trends, and strategic developments influencing market expansion.
| REPORT COVERAGE | DETAILS |
|---|---|
|
Market Size Value In |
USD 8456.46 Billion in 2026 |
|
Market Size Value By |
USD 13626.53 Billion by 2035 |
|
Growth Rate |
CAGR of 5.44% from 2026 - 2035 |
|
Forecast Period |
2026 - 2035 |
|
Base Year |
2025 |
|
Historical Data Available |
Yes |
|
Regional Scope |
Global |
|
Segments Covered |
|
|
By Type
|
|
|
By Application
|
Frequently Asked Questions
The global Dewatering Pump Market is expected to reach USD 13626.53 Million by 2035.
The Dewatering Pump Market is expected to exhibit a CAGR of 5.44% by 2035.
Grundfos, Sulzer, Xylem, The Weir Group, KSB, Ebara, Wacker Neuson, Tsurumi Pump, Zoeller Pumps, Honda Power Equipment, Mersino Dewatering, Nanfang Pump Industry, Zhejiang EO Pump, Veer Pump
In 2026, the Dewatering Pump Market is estimated at USD 8456.46 Million.
What is included in this Sample?
- * Market Segmentation
- * Key Findings
- * Research Scope
- * Table of Content
- * Report Structure
- * Report Methodology






