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利用人工模拟降雨,探索水土流失规律和治理效益,在国外一些科学技术先进国家已被广泛采用。美国除保留少数逞流小区外,几乎所有坡地水土流失资料都由人工降雨试验取得。通用土壤流失方程中土壤、植被和管理因子的数据完全由人工降雨试验测定。在国内,不少单位也已开始研究应用,但多数为室内的、小规模的人工降雨,真正用于野外试验的还不多。人工模拟降雨的应用,缩短了试验周期,加快了研究速度,同时可以人为控制降雨变量,事前产生出试验所要求的设计雨型。 我们在学习国内外经验的基础上,从
It has been widely adopted in some foreign countries with advanced science and technology by using simulated rainfall and exploring the law of soil and water loss and harnessing benefits. In addition to retaining a handful of successful cities in the United States, almost all slope soil erosion information was obtained by artificial rainfall test. The data of soil, vegetation and management factors in general soil loss equation are completely determined by artificial rainfall test. In China, quite a few units have started to study and apply them, but most of them are indoor and small-scale artificial rainfall. There are not many real experiments in the field. The application of artificial rainfall has shortened the test period and accelerated the research speed. At the same time, the rainfall variable can be artificially controlled and the designed rain pattern required by the experiment can be generated in advance. We learn from the experience at home and abroad, based on