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二道营小流域位于兴和县南部,属永定河二级支流银子川水系。流域面积3.91km~2,其中,水土流失面积3.68km~2,占流域总面积的94％。该流域年均气温4.2℃,多年平均降雨量为420mm,降水主要集中在6～9月份;多年平均径流深为50mm;侵蚀模数为5000t％km~2·a);年均输沙量1.95万t;属土石缓坡丘陵严重侵蚀区。 流域内只有二道营一个自然村,679口人,有耕地3870亩,其中简易坝地200亩。平常年景人均粮食200公斤,收入90元,经济来源主要依靠农业生产。但在十年九旱的气候条件下,该区人民的温饱问题却难以保证。贫困的经济状况,促使当地农民将改造土地,提高单产,解决温饱问题放在首要地位。
Erdouying small watershed is located in the southern Xinghe County, is a secondary Yongding River Yinchuan River system. Basin area of 3.91km ~ 2, of which, soil erosion area of 3.68km ~ 2, accounting for 94% of the total basin area. The average annual temperature of the basin is 4.2 ℃, and the annual average rainfall is 420mm. The precipitation is mainly concentrated in June-September. The mean annual runoff depth is 50mm. The erosion modulus is 5000t% km ~ 2 · a. The average annual sediment transport is 1.95 Wan t; is a serious erosion area of gentle slope hills. There are only two villages in Erdou camp, 679 people, 3870 mu of arable land, of which 200 mu are simple dam areas. Average annual food 200 kilograms per capita, income 90 yuan, the main source of income rely on agricultural production. However, under the climate of nine drought in ten years, the people in the area have not been able to provide adequate food and clothing. The poor economic conditions have prompted local farmers to give top priority to transforming the land, raising yields and solving the problem of food and clothing.