Traditional Culture Encyclopedia - Weather forecast - What are the causes of frequent floods in the Tennessee River Basin?
What are the causes of frequent floods in the Tennessee River Basin?
The main stream area is subject to windy sand and floating dust, with the most serious weather in the downstream areas. The average number of sandy winds (≧5 m/s) per year is 202 days, the maximum wind speed is 40 m/s, and the dominant wind direction is from the northeast to Northeast East.
The drought index increases from north to south and from west to east, ranging from 17 to 50.
The closer to the river, the richer the plant species and the better the growth. On the contrary, the simpler the plant species, the poorer the growth. Affected by human activities in irrigated areas, the characteristics of natural vegetation have also changed due to changes in ecological conditions.
Land desertification in the Tarim River Basin is very serious, and land desertification is developing at an alarming rate. Land desertification has led to rising temperatures, aggravated droughts, increased days of strong winds and sandstorms, declining vegetation, and burying traffic roads, farmland and villages, seriously threatening the survival and development of oases. Spring is a critical period for crop growth, when river runoff is at its driest. Due to the lack of regulation and storage projects, large-scale yields are often reduced due to drought.
Due to unreasonable utilization of water resources and unmatched irrigation and drainage, secondary salinization of soil in the irrigation areas in the Tarim River Basin is very serious.
In a year, the maximum runoff of the Tarim River generally occurs in August
What is the reason for the frequent floods in the Tennessee River Basin? Seasonal changes in water levels are large, with heavy rains in late winter and early spring, easily causing flooding; water levels are lower in summer.
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