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一支由法国科学家组成的科学考察小组对黄河进行了一番考察后,写出一篇分析黄河的起源、水质、黄土的沉淀现象的科学考察报告,其中有关黄土高原的黄土流失以及黄河泛滥的一段极其令人深思。报告写道,黄土高原很有保留地将黄土奉献给黄河及其支流,每年被黄河水冲走的黄土可达15亿吨,在河水上涨时这个数字还要增加一倍。在这15亿～30亿吨的黄土中有25％被冲进渤海,另外的25％被冲到黄河三角洲,而最后剩下的50％的黄土则沉淀在河床里和水库里,严重地降低了河床和水库的蓄水能力。那么造成黄土高原黄土大量流失的原因是什么呢?法
A scientific inspection team composed of French scientists made a survey of the Yellow River and wrote a scientific inspection report that analyzed the origin, water quality and precipitation of the Yellow River. In the report, there was a report on the loess loss and the flood of the Yellow River in the Loess Plateau A very thought-provoking. The report wrote that the loess plateau has given its loess a reservation to the Yellow River and its tributaries with a reservation, and the loess washed away by the Yellow River water annually can reach 1.5 billion tons, doubling as the river rises. 25% of these 1.3 billion to 3 billion tons of loess are washed into the Bohai Sea and the other 25% are washed into the Yellow River Delta, while the last remaining 50% of the loess settles down in river beds and reservoirs, severely reducing The river bed and reservoir water storage capacity. So what is the reason for the massive loss of loess in the Loess Plateau?