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。

canjiachengxiangjuminjibenyanglaobaoxiande，yinweiqianqijiaofeixianzhudiyuchengzhenzhigongjibenyanglaobaoxianjiaofei，tuixiuhoulingqudeyanglaojinyexianzhudiyuhouzhe，canbaohouzhedetuixiujinquanguopingjunshuipingjiejinmeiyue3000yuan。参(can)加(jia)城(cheng)乡(xiang)居(ju)民(min)基(ji)本(ben)养(yang)老(lao)保(bao)险(xian)的(de)，(，)因(yin)为(wei)前(qian)期(qi)缴(jiao)费(fei)显(xian)著(zhu)低(di)于(yu)城(cheng)镇(zhen)职(zhi)工(gong)基(ji)本(ben)养(yang)老(lao)保(bao)险(xian)缴(jiao)费(fei)，(，)退(tui)休(xiu)后(hou)领(ling)取(qu)的(de)养(yang)老(lao)金(jin)也(ye)显(xian)著(zhu)低(di)于(yu)后(hou)者(zhe)，(，)参(can)保(bao)后(hou)者(zhe)的(de)退(tui)休(xiu)金(jin)全(quan)国(guo)平(ping)均(jun)水(shui)平(ping)接(jie)近(jin)每(mei)月(yue)3(3)000元(yuan)。(。)