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4.1 Introduction to Water Systems - Coggle Diagram
4.1 Introduction to Water Systems
Key Concepts and Terminology:
Hydrological Cycle:
Processes: Evaporation, transpiration, condensation, precipitation, infiltration, runoff.
Stores: Oceans, ice caps, glaciers, lakes, rivers, atmosphere, soil moisture, groundwater.
Flows: Surface runoff, groundwater flow, streamflow.
Aquifers and Groundwater:
Aquifers: Permeable rock layers that can store and transmit water.
Groundwater: Water stored underground in soil or rock formations.
Recharge and Discharge Areas: Zones where groundwater is replenished and zones where it flows out to the surface.
Watersheds and Drainage Basins:
Watershed: The area of land where all of the water under it or draining off of it goes into the same place.
Drainage Basin: The land area that contributes water to a particular stream or river.
Catchment Area: Another term for drainage basin.
Surface Water and Freshwater Resources:
Surface Water: Water located on the surface of the Earth such as rivers, lakes, and reservoirs.
Freshwater Resources: Includes surface water and groundwater that is suitable for human consumption.
Human Impact on Water Systems:
Water Extraction and Use:
Agriculture: Major consumer of freshwater through irrigation.
Industry: Water used in manufacturing processes.
Domestic Use: Water used for household activities.
Over-extraction: Leads to depletion of aquifers and reduced surface water flow.
Pollution:
Point Source Pollution: Pollution from a single, identifiable source, such as a factory or sewage treatment plant.
Non-Point Source Pollution: Diffuse pollution from multiple sources, such as agricultural runoff.
Types of Pollutants: Nutrients (nitrates and phosphates), heavy metals, pathogens, chemicals.
Water Management and Conservation:
Sustainable Water Management: Practices that ensure water availability for future generations.
Integrated Water Resources Management (IWRM): Coordinated development and management of water, land, and related resources.
Ecological Importance of Water Systems:
Biodiversity and Habitats:
Wetlands: Areas where water covers the soil, providing critical habitat for many species.
Rivers and Streams: Provide habitat and migration routes for fish and other wildlife.
Ecosystem Services:
Provisioning Services: Water supply for drinking, agriculture, and industry.
Regulating Services: Flood control, climate regulation through evaporation and transpiration.
Cultural Services: Recreational opportunities, aesthetic value.
Climate Change and Water Systems:
Impact of Climate Change:
Changes in Precipitation Patterns: Altered rainfall and snowfall, affecting water availability.
Melting Glaciers and Ice Caps: Contributing to sea-level rise and changes in freshwater supply.
Extreme Weather Events: Increased frequency and intensity of floods and droughts
Case Studies and Examples:
Aral Sea: Example of over-extraction and mismanagement leading to severe environmental degradation.
The Nile Basin: Complex water management issues involving multiple countries.
Bangladesh Floods: Impact of monsoon rains and river management on flooding.