All Flashcards
Why is irrigation important?
It enables crop production in areas with insufficient rainfall, but it's the largest consumer of freshwater globally.
Why is salinization a problem?
High salt concentrations inhibit plant growth and reduce crop yields.
What is the significance of the Ogallala Aquifer?
It's a major source of water for agriculture in the Great Plains of the USA.
Why is aquifer replenishment important?
Replenishment is crucial to prevent depletion and ensure a sustainable water supply.
Why is water conservation important in irrigation?
Because irrigation is the largest consumer of freshwater globally.
What is the relationship between irrigation and soil health?
Improper irrigation techniques can lead to soil degradation, such as salinization.
What is the role of aquifers in the water cycle?
Aquifers store groundwater, which is a vital part of the water cycle and a source of freshwater.
What are the environmental impacts of over-pumping aquifers?
Can lead to depletion, land subsidence, and saltwater intrusion in coastal areas.
What are the economic considerations of different irrigation methods?
More efficient methods often have higher initial costs but can lead to long-term savings.
What is the impact of irrigation on water quality?
Runoff from irrigated fields can carry fertilizers and pesticides, polluting water sources.
What is irrigation?
Artificially watering crops.
What is salinization?
Accumulation of salt in the soil due to water evaporation after irrigation.
What are aquifers?
Underground layers of rock or soil that hold groundwater.
Define drip irrigation.
Water delivered directly to plant roots through underground hoses.
Define flood irrigation.
Water is dumped onto a field and allowed to spread.
Define furrow irrigation.
Water flows through trenches dug between rows of crops.
Define spray irrigation.
Water is sprayed over the field from a central location.
Define groundwater.
Water held underground in the soil or in pores and crevices in rock.
Define water table.
The upper level of the saturated zone of groundwater.
What is aquifer depletion?
The overuse and subsequent reduction in groundwater levels within an aquifer.
What are the effects of flood irrigation?
Water waste, soil erosion, and increased salinization.
What causes salinization?
Evaporation of irrigation water leaves salts behind in the soil.
What are the consequences of aquifer depletion?
Reduced water availability, land subsidence, and ecosystem damage.
What are the effects of using pesticides and fertilizers in irrigation?
Water pollution, harming aquatic ecosystems and potentially contaminating drinking water.
What are the environmental impacts of inefficient irrigation?
Water scarcity, soil degradation, and reduced crop yields.
What are the effects of climate change on water availability for irrigation?
Changes in precipitation patterns, increased evaporation, and reduced snowpack can decrease water availability.
What are the effects of deforestation on water resources used for irrigation?
Reduced infiltration, increased runoff, and decreased water availability for irrigation.
What are the effects of urbanization on water resources used for irrigation?
Increased demand for water, reduced infiltration, and increased pollution of water sources.
What are the effects of overgrazing on water resources used for irrigation?
Soil compaction, reduced infiltration, and increased runoff, leading to decreased water availability.
What are the effects of using groundwater for irrigation?
Aquifer depletion, land subsidence, and saltwater intrusion in coastal areas.