概述
陜(shan)南漢江流域出現了(le)一次大(da)范(fan)圍、高(gao)強度降水(shui)過程。降雨(yu)引起江漢干支(zhi)流漲水(shui),漢江安(an)康(kang)水(shui)庫入庫洪峰達到50年一遇,安(an)康(kang)水(shui)庫迎(ying)來建(jian)庫后最大(da)入庫洪水(shui)。洪水(shui)過程峰高(gao)量大(da),安(an)康(kang)水(shui)庫充分發揮(hui)大(da)型水(shui)庫攔洪、錯峰、削峰作用,取得了(le)顯(xian)著(zhu)防洪減災(zai)效益。
科學調度發揮顯著防洪減災效益
按照省、市防(fang)(fang)指多(duo)次會(hui)商研究的(de)(de)調(diao)度(du)方(fang)案,安(an)(an)(an)康(kang)(kang)水(shui)(shui)(shui)庫(ku)在(zai)漲水(shui)(shui)(shui)時(shi)(shi)(shi)提前預泄騰出防(fang)(fang)洪(hong)(hong)庫(ku)容、在(zai)洪(hong)(hong)峰段(duan)控制下(xia)(xia)(xia)泄量,為下(xia)(xia)(xia)游抗洪(hong)(hong)搶險救災創(chuang)造了(le)有(you)利(li)條件。經(jing)初步分析計(ji)算,這(zhe)次漢江安(an)(an)(an)康(kang)(kang)段(duan)特大洪(hong)(hong)水(shui)(shui)(shui)期間(jian),通(tong)(tong)過(guo)(guo)(guo)對安(an)(an)(an)康(kang)(kang)水(shui)(shui)(shui)庫(ku)及時(shi)(shi)(shi)、合理調(diao)度(du),實現(xian)了(le)三個方(fang)面的(de)(de)減(jian)災效果。一是通(tong)(tong)過(guo)(guo)(guo)削峰調(diao)節將可能進(jin)入安(an)(an)(an)康(kang)(kang)城區(qu)(qu)河段(duan)的(de)(de)25537秒立(li)米洪(hong)(hong)峰流量,削減(jian)至(zhi)19178秒立(li)米,削峰6359秒立(li)米,降低下(xia)(xia)(xia)游安(an)(an)(an)康(kang)(kang)站(zhan)洪(hong)(hong)峰水(shui)(shui)(shui)位達3.9米,避免了(le)漢江安(an)(an)(an)康(kang)(kang)城區(qu)(qu)南北(bei)兩(liang)岸和下(xia)(xia)(xia)游旬陽、白河縣城發生慘重損失。二是通(tong)(tong)過(guo)(guo)(guo)錯峰調(diao)節將安(an)(an)(an)康(kang)(kang)站(zhan)最大洪(hong)(hong)峰流量出現(xian)時(shi)(shi)(shi)間(jian),由(you)18日18時(shi)(shi)(shi)推遲(chi)至(zhi)18日23時(shi)(shi)(shi),滯后(hou)5小(xiao)時(shi)(shi)(shi),為安(an)(an)(an)康(kang)(kang)東壩片區(qu)(qu)3萬余名(ming)群眾全(quan)部安(an)(an)(an)全(quan)撤離(li)贏得寶(bao)貴時(shi)(shi)(shi)間(jian)。三是通(tong)(tong)過(guo)(guo)(guo)水(shui)(shui)(shui)庫(ku)攔洪(hong)(hong)作(zuo)用將洪(hong)(hong)水(shui)(shui)(shui)總量的(de)(de)28.7%,近5.36億立(li)方(fang)米洪(hong)(hong)水(shui)(shui)(shui)攔蓄在(zai)庫(ku)內,減(jian)小(xiao)了(le)進(jin)入下(xia)(xia)(xia)游河道洪(hong)(hong)水(shui)(shui)(shui)總量,有(you)利(li)于下(xia)(xia)(xia)游洪(hong)(hong)水(shui)(shui)(shui)平(ping)穩通(tong)(tong)過(guo)(guo)(guo),起到減(jian)少(shao)堤防(fang)(fang)臨洪(hong)(hong)壓(ya)力的(de)(de)作(zuo)用。
通過對安(an)康水庫的(de)科學調度,優化了(le)天(tian)然形態(tai)下的(de)洪水形態(tai),給(gei)漢江安(an)康段防洪搶(qiang)險工作(zuo)帶來了(le)有效保障(zhang)與轉變,防洪減災作(zuo)用(yong)顯著。
目前,水庫壩體(ti)穩定(ding),運行良好(hao)。