门头沟区,地处北京西郊,地形复杂,耕地很少。水源条件较差。近些年,发展水浇地的投资不少,但是,工程难度大,进度缓慢,建国后到1977年,28年只发展水浇地4.4万亩。仅占全区耕地面积的36％。可见因水源条件和地形所限,采用常规的地方灌溉方法达到水利化是很困难的。 Mentougou District, located in the western suburbs of Beijing, the terrain is complex, very little arable land. Poor water conditions. In recent years, there has been a lot of investment in the development of irrigated land. However, the project is difficult and slow to progress. After the founding of the People’s Republic until 1977, only 44,000 mu of irrigated land was developed in 28 years. Accounting for only 36% of the cultivated area in the region. Can be seen due to water conditions and terrain constraints, the use of conventional local irrigation methods to achieve water conservancy is very difficult.