#trs_autoadd_1229667916312 { margin-top: 0px; font-size: 12pt; margin-bottom: 0px; line-height: 1.5; font-family: 宋体 } #trs_autoadd_1229667916312 p { margin-top: 0px; font-size: 12pt; margin-bottom: 0px; line-height: 1.5; font-family: 宋体 } #trs_autoadd_1229667916312 td { margin-top: 0px; font-size: 12pt; margin-bottom: 0px; line-height: 1.5; font-family: 宋体 } #trs_autoadd_1229667916312 div { margin-top: 0px; font-size: 12pt; margin-bottom: 0px; line-height: 1.5; font-family: 宋体 } #trs_autoadd_1229667916312 li { margin-top: 0px; font-size: 12pt; margin-bottom: 0px; line-height: 1.5; font-family: 宋体 } /**---json-- {"":{"line-height":"1.5","font-family":"宋体","font-size":"12pt","margin-top":"0","margin-bottom":"0"},"p":{"line-height":"1.5","font-family":"宋体","font-size":"12pt","margin-top":"0","margin-bottom":"0"},"td":{"line-height":"1.5","font-family":"宋体","font-size":"12pt","margin-top":"0","margin-bottom":"0"},"div":{"line-height":"1.5","font-family":"宋体","font-size":"12pt","margin-top":"0","margin-bottom":"0"},"li":{"line-height":"1.5","font-family":"宋体","font-size":"12pt","margin-top":"0","margin-bottom":"0"}} --**/

中图分类号x522 文献标志码b 文章编号1673 - 4637 ( 2007 ) 06 - 0014 - 03

 

1 昌平区主要河流现状

 

昌平区位于北京市西北部, 是北京市远郊区县之一。区内河流主要有: 北运河水系的温榆河、永定河水系的老峪沟、潮白河水系的黑山寨沟。北运河水系的温榆河其支流主要有南沙河、北沙河、东沙河、蔺沟河。温榆河干流是境内的主干排洪河道,其主流源于八达岭主峰下关沟, 东南流经居庸关、南口, 出关沟与源于西山的塘泥沟、白羊城沟、高崖口沟及桃峪口沟等5 条大沟的河水汇合后称北沙河。北沙河东流至沙河镇, 与东沙河、南沙河