7yue30ri20shi，hebeiqiyongdaluze、ningjinboxuzhihongqufuyangheyixiquyuzhihong，zheshihaiheliuyudiyida、quanguodisandaxuzhihongqu。qiyonghou，keyibaohutianjin、jinghuxian、shidexian、huabeiyoutiandengxiayoudiqufanghonganquan。7(7)月(yue)3(3)0日(ri)2(2)0时(shi)，(，)河(he)北(bei)启(qi)用(yong)大(da)陆(lu)泽(ze)、(、)宁(ning)晋(jin)泊(bo)蓄(xu)滞(zhi)洪(hong)区(qu)滏(fu)阳(yang)河(he)以(yi)西(xi)区(qu)域(yu)滞(zhi)洪(hong)，(，)这(zhe)是(shi)海(hai)河(he)流(liu)域(yu)第(di)一(yi)大(da)、(、)全(quan)国(guo)第(di)三(san)大(da)蓄(xu)滞(zhi)洪(hong)区(qu)。(。)启(qi)用(yong)后(hou)，(，)可(ke)以(yi)保(bao)护(hu)天(tian)津(jin)、(、)京(jing)沪(hu)线(xian)、(、)石(shi)德(de)线(xian)、(、)华(hua)北(bei)油(you)田(tian)等(deng)下(xia)游(you)地(di)区(qu)防(fang)洪(hong)安(an)全(quan)。(。)