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一、流域概况 大柳家流域地处山东省栖霞县大柳家乡北部。流域总面积22.15平方公里,属纯山区。流域人口5500余人,耕地5532亩,境内山峦重叠,沟壑纵横。大柳家河纵贯南北,两侧干沟11条,支沟49条,毛沟374条。沟河总长231.9公里,沟壑密度为10.47公里/平方公里。共有大小山头146个,山坡坡度多在25°左右。地质为前震旦纪胶东群,主要岩性有片麻花岗岩、斜长角闪岩和第四纪残积坡积层,无大片裸岩分布。棕壤,呈微酸性,质地较粗,平均土层厚度20厘米。
First, the basin profile Daliusi Basin is located in Qixia County, Shandong Province, home to the northern part of Big Dipper. The total basin area of 22.15 square kilometers, is a pure mountain area. More than 5,500 people in the basin, 5532 acres of arable land, the territory of overlapping mountains, ravines aspect. Large Willow River runs north and south, on both sides of the ditch 11, branch ditch 49, 374 furrows. Ditch River total length of 231.9 km, gully density of 10.47 km / square kilometers. A total of 146 hills the size of the hillside slope at about 25 °. Geology for the former Sinian Jiaodong group, the main lithology of gneiss granite, amphibolite and Quaternary sedimentary slope, no large parts of bare rock distribution. Brown soil, slightly acidic, coarse texture, the average soil thickness of 20 cm.