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。

da：beiyuefenghuigongbaolianpianleidu，laotiaozhongdan，chongchizhelengzhansiweiheyishixingtaipianjian。gongbaoshehuaneirongwanggujibenshishi，siyiwaiquzhongfanglichanghezhengce，keyimoheizhongguo，womenduicijianjuefanduihejujue。答(da)：(：)北(bei)约(yue)峰(feng)会(hui)公(gong)报(bao)连(lian)篇(pian)累(lei)牍(du)，(，)老(lao)调(tiao)重(zhong)弹(dan)，(，)充(chong)斥(chi)着(zhe)冷(leng)战(zhan)思(si)维(wei)和(he)意(yi)识(shi)形(xing)态(tai)偏(pian)见(jian)。(。)公(gong)报(bao)涉(she)华(hua)内(nei)容(rong)罔(wang)顾(gu)基(ji)本(ben)事(shi)实(shi)，(，)肆(si)意(yi)歪(wai)曲(qu)中(zhong)方(fang)立(li)场(chang)和(he)政(zheng)策(ce)，(，)刻(ke)意(yi)抹(mo)黑(hei)中(zhong)国(guo)，(，)我(wo)们(men)对(dui)此(ci)坚(jian)决(jue)反(fan)对(dui)和(he)拒(ju)绝(jue)。(。)