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一、水土保持的重要意义 水是一切生命之源,土是万物生长之本,“土之不存,人将安附?”。我国山地和丘陵面积广大,约占陆地总面积的三分之二,是一个多山多高原的国家,具备产生水土流失的客观条件。由于历史上的战乱和掠夺式的土地利用方式等原因,使我国产生了严重的水土流失。分布之广,面积之大,程度之烈,已属世界前列。例如,长城以北的风沙,西北黄土高原的沟蚀,南方的“红色沙漠”、“白沙岗”、“光板地”,和华南的崩岗等。严重的水土流失,
First, the significance of water and soil conservation Water is the source of all life, the soil is the growth of all things, “the soil does not exist, people will be attached?” China’s vast mountainous and hilly area, accounting for about two-thirds of the total land area, is a mountainous and plateau countries, with the objective conditions of soil and water loss. Due to the history of war and predatory land use and other reasons, our country has had serious soil and water loss. Widely distributed, large area, the degree of fierce, already in the forefront of the world. For example, sand blown north of the Great Wall, gully erosion of the Loess Plateau in the northwest, “Red Desert”, “Baishagang”, “Light Plate Land” in the south, and collapse in South China. Serious soil erosion,