Summary of Hydrology and Water Management Terminology
Hydrology & Water Management Terminology: A Student Guide
Introduction
Hydrology and water management are key to understanding how water moves, is stored, and is controlled in natural and engineered systems. This material organizes core vocabulary used in hydrology and civil water management, explains concepts, and shows practical applications for planning, flood protection, and water supply.
Basic Terms and Concepts
Water sources and movement
Definition: Groundwater is the water stored beneath the Earth's surface in pore spaces and rock fractures.
- Groundwater — water beneath the surface; feeds springs and wells.
- Runoff — water that flows on the surface toward streams and rivers.
- Infiltrate / Infiltration — water entering the soil and percolating downward.
- Percolate — slow movement of water through soil and porous rock.
Practical example: After heavy rain, some water runs off to streams while some infiltrates to recharge an aquifer.
Storage and structures
Definition: A reservoir is an artificial or natural lake used to store water for supply, flood control, or power generation.
- Aquifer — an underground layer of water-bearing rock or sediment.
- Reservoir — stored water behind a dam.
- Dam types: arch dam, buttress dam, embankment dam (earth fill, rock fill), gravity dam.
Table — Dam types and key features
| Dam type | Main structural principle | Typical use |
|---|---|---|
| Arch dam | Curved to transfer load to abutments | Narrow canyons, high strength rock |
| Buttress dam | Supports a slab with buttresses | Saves material, suits certain foundations |
| Embankment (earth/rock fill) | Mass of compacted material resists water | Wide valleys, flexible to settlement |
| Gravity dam | Weight resists water thrust | Straight valleys, concrete heavy structure |
Flow control and conveyance
Definition: A spillway is a structure that safely conveys excess water from a reservoir downstream without damaging the dam.
- Spillway / Weir / Sluice — structures to control flow and release water.
- Lock — enables navigation past a change in water level.
- Canal / Aqueduct — convey water for irrigation, navigation, or supply; bypass canals reroute flow.
- Cofferdam — temporary enclosure to build or repair structures in dry conditions.
Practical application: A spillway limits reservoir level during floods while sluices allow controlled releases to manage downstream flow.
Hydrologic processes and measurements
Definition: Precipitation encompasses all forms of water, liquid or solid, that fall from the atmosphere to the surface.
- Evaporation / Evaporate / Evaporation — water turning to vapor from surfaces.
- Condense / Condensation — vapor turning into liquid (clouds, rain formation).
- Precipitation — rainfall, snow, and other atmospheric water falling to Earth.
- Discharge / Flow — volume of water passing a point per unit time; maximum flow is important for flood design.
Simple relation (conceptual): discharge depends on catchment area, precipitation, infiltration, and storage.
Water quality and use
Definition: Potable water is water safe for human consumption.
- Potable water — treated or naturally safe drinking water.
- Sewage / Sewerage / Sewer — wastewater and the infrastructure conveying it.
- Leak / Leakage / Seep / Seepage — unwanted movement of water through structures or soils.
Real-world note: Ensuring potable water often requires protecting catchment areas from contamination and maintaining reservoir integrity.
Forces and stability in hydraulic structures
Definition: Thrust or lateral pressure is the horizontal force exerted by water on retaining structures.
- Uplift / upward p. / downward p. — vertical pressure differences acting on foundations and dams.
- Thrust — horizontal (lateral) pressure from
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Hydrology Vocabulary Essentials
Klíčová slova: Hydrology and Water Management Vocabulary, Water terminology
Klíčové pojmy: Understand groundwater, aquifer, and recharge processes, Differentiate dam types: arch, buttress, embankment, gravity, Distinguish spillway, sluice, and weir for flow control, Relate infiltration, percolation, and runoff in a catchment, Identify structures for flood control: levee, flood barrier, reservoir, Recognize uplift and thrust as forces on dams and foundations, Use discharge and maximum flow when designing flood-capacity structures, Protect potable water by managing catchments and preventing leakage, Inspect and maintain hydraulic structures to extend longevity, Apply hydrologic modeling to size canals, spillways, and reservoirs, Know terms for wastewater systems: sewer, sewage, sewerage, Use inlet/outlet and locks/aqueducts for navigation and conveyance