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1985年我校水土保持专业与绥德水土保持科学试验站,对无定河流域人类活动增加流域产沙进行了调查,现对调查结果作一初步分析。 一、调查内容、方法及验证 1.调查内容 根据无定河流域经济发展的特点,我们主要调查了开荒、采矿、兴修道路、建设窑洞等几项人类活动对流域产沙的影响,调查时间分为1950～1982年、1983～1985年两个时段。
In 1985, the soil and water conservation specialty of our school and Suide Soil and Water Conservation Science Experimental Station investigated the human activities in the Wudinghe River Basin to increase the sediment yield in the watershed, and made a preliminary analysis of the survey results. I. Contents, Methods and Verification of Investigation 1. Investigation According to the characteristics of economic development in Wudinghe River Basin, we mainly investigated the impacts of land reclamation on the sediment yield of several watersheds such as land reclamation, mining, road construction and cave dwellings construction. The investigation time points For the 1950 ~ 1982, 1983 ~ 1985 two periods.