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。

zhecixiehong，ranggongdisunshicanzhong。zhangxianshengcheng，xiangmushijingzhuangxiujiaofu，yilouhedikudezhuangxiuyaoquanbuzhongzuo，henduofangzaidimianshangdeshebeiyijingpaoshui，douhuaidiaole。weilejieshengdianliang，nengjishilianxidaowaimian，tamendeshoujidoushilunliushiyong。这(zhe)次(ci)泄(xie)洪(hong)，(，)让(rang)工(gong)地(di)损(sun)失(shi)惨(can)重(zhong)。(。)张(zhang)先(xian)生(sheng)称(cheng)，(，)项(xiang)目(mu)是(shi)精(jing)装(zhuang)修(xiu)交(jiao)付(fu)，(，)一(yi)楼(lou)和(he)地(di)库(ku)的(de)装(zhuang)修(xiu)要(yao)全(quan)部(bu)重(zhong)做(zuo)，(，)很(hen)多(duo)放(fang)在(zai)地(di)面(mian)上(shang)的(de)设(she)备(bei)已(yi)经(jing)泡(pao)水(shui)，(，)都(dou)坏(huai)掉(diao)了(le)。(。)为(wei)了(le)节(jie)省(sheng)电(dian)量(liang)，(，)能(neng)及(ji)时(shi)联(lian)系(xi)到(dao)外(wai)面(mian)，(，)他(ta)们(men)的(de)手(shou)机(ji)都(dou)是(shi)轮(lun)流(liu)使(shi)用(yong)。(。)