发源于河北省涞源县太行山东麓的拒马河流经北京市房山区，流至张坊镇分成南北二支，北支称北拒马河。北拒马河顺涿州而下与大石河、小清河汇流南折流至白沟镇。因此，涿州因山区泄洪造成大量积水。

gongkaibaodaozhong，wulunshizhongyangjiweiguojiajianweihaishigedifangjiweijianweitongbaodeweifanzhongyangbaxiangguidingjingshenwenti，dabufendoufashengzaidangdeshibada、shijiudazhihou，dangdeershidazhiqian。公(gong)开(kai)报(bao)道(dao)中(zhong)，(，)无(wu)论(lun)是(shi)中(zhong)央(yang)纪(ji)委(wei)国(guo)家(jia)监(jian)委(wei)还(hai)是(shi)各(ge)地(di)方(fang)纪(ji)委(wei)监(jian)委(wei)通(tong)报(bao)的(de)违(wei)反(fan)中(zhong)央(yang)八(ba)项(xiang)规(gui)定(ding)精(jing)神(shen)问(wen)题(ti)，(，)大(da)部(bu)分(fen)都(dou)发(fa)生(sheng)在(zai)党(dang)的(de)十(shi)八(ba)大(da)、(、)十(shi)九(jiu)大(da)之(zhi)后(hou)，(，)党(dang)的(de)二(er)十(shi)大(da)之(zhi)前(qian)。(。)