ENV200H1 Chapter 9: ENV200 Chap 9 Notes (Aquatic Resources, Uses and Management )
Document Summary
Runoff y movement of fresh water from precipitation and snowmelt to rivers, lakes, wetlands and ocean y replenishes surface waters. Water withdrawal y removal of water from source such as lake or river where portion of this water is returned to source y water available to be used again y household and industrial uses are examples of withdrawals. Water consumption y removal of water for human use without any return of water to original source y agricultural crop irrigation is the largest consumptive use of water. Aquifer depletion y removal of groundwater faster than it can be recharged by precipitation or melting snow. Salt-water intrusion y movement of sea water into a freshwater aquifer near coast when water table drops due to withdrawal rates that exceed groundwater recharge. Sediment pollution y caused by transportation of silt, clay and sand particles into waterways y water becomes cloudy and impedes sunlight penetration restricting photosynthesis.
