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韭园沟是无定河中下游左岸的一条支沟。流域面积70.7平方公里,海拔820～1100米,主沟长18公里,200米以上支毛沟337条,一般沟深100～150米,治理前水土流失严重。在黄土丘陵沟壑区具有代表性。 三十年来,韭园沟作为流域综合治理和径流泥沙试验研究的重点区,积累了一定的资料;经过治理,流域内径流泥沙的输移情况发生了显著的变化。本文根据实测水文资料,将变化的原因初步分析如下:
Jiuyuan ditch is the left bank of the middle and lower reaches of Wuding a branch ditch. Basin area of 70.7 square kilometers, elevation 820 ~ 1100 meters, the main channel 18 km long, 200 meters above the furrows 337, the general ditch 100 to 150 meters, before the serious soil erosion. In loess hilly and gully area is representative. In the past 30 years, Jiuyuangou has accumulated a certain amount of information as a key area for comprehensive management and runoff and sediment research in the watershed. After the treatment, the transport and transport of sediment within the watershed has undergone significant changes. Based on the measured hydrological data, this paper analyzes the reasons for the change as follows: