Traditional Culture Encyclopedia - Weather inquiry - What is the cause of the drought?

What is the cause of the drought?

The cause of drought is not only related to natural factors such as meteorology, but also related to human activities and the ability to cope with drought. Specifically, it can be divided into meteorological reasons, landform reasons, insufficient water source conditions and drought resistance, population factors and low effective utilization rate of water resources:

1, meteorological reasons: meteorological conditions such as no precipitation for a long time or less precipitation are the main factors causing drought.

2. Topographic reasons: Topographic conditions are an important cause of regional drought.

3. Insufficient water source conditions and drought resistance: Drought is also closely related to poor water source conditions caused by insufficient water conservancy facilities, such as reservoirs and wells.

4. Population factor: Due to the sustained growth of population and the rapid development of local social economy, the water consumption for living and production is increasing, which leads to the over-exploitation of water resources in some areas and exceeds the carrying capacity of local water resources.

5. The effective utilization rate of water resources is low: due to more precipitation and less water shortage in normal years in southwest China, the effective utilization rates of agricultural water, industrial water and domestic water are obviously different from those in perennial water shortage areas in China, which is not conducive to drought resistance.

Extended data:

Drought resistance measures:

1. Build water conservancy and develop farmland irrigation.

2. Improve farming system, change crop composition, select drought-tolerant varieties and make full use of limited rainfall.

3, afforestation, improve the regional climate, reduce evaporation, reduce the harm of dry wind.

4. Multi-pronged prevention and control of soil erosion.

5, research and application of modern technology and water-saving measures, such as artificial rainfall, spray drip irrigation, plastic film mulching, moisture conservation and temporary use of inferior water sources, including inferior groundwater and seawater.

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