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小河沟流域是泾河水系的一级支流四郎河右岸的一条支沟,流域面积16.78km~2,有塬面、塬坡、谷坡和沟底四种地貌类型。流域内现有人口4235人,平均人口密度252人/km~2,总耕地面积10376.7亩,耕垦指数41.2％,人均占有耕地2.45亩,坡地多,平地少。流域属温带湿润半湿润气候区,具大陆性气候特点,多年平均降水623.1mm,降水主要集中于7、8、9三个月。位于黄土高原丘陵沟壑区的小河沟小流域同区内其它流域
Xiahegou watershed is a branch ditch on the right bank of Silang River, a first-order tributary of Jinghe River system. Its drainage area is 16.78km ~ 2. There are four types of landform including plateau, slope, valleys and ditches. The existing population of 4235 people in the basin, the average population density of 252 people / km ~ 2, the total area of 10376.7 acres of arable land, cultivation index of 41.2%, 2.45 acres of arable land per capita, more slope, less flat. Basin is a temperate humid humid climate zone, with continental climate characteristics, annual average rainfall 623.1mm, precipitation is mainly concentrated in 7,8,9 three months. Located in the hilly and gully area of Loess Plateau Xiaohegou small watershed with the other basin