概述
陜南漢江流域出現(xian)了(le)一次大(da)范圍、高強度降水(shui)(shui)(shui)(shui)過(guo)程。降雨(yu)引起江漢干支流漲水(shui)(shui)(shui)(shui),漢江安(an)(an)康水(shui)(shui)(shui)(shui)庫入庫洪(hong)(hong)峰(feng)(feng)達到50年一遇(yu),安(an)(an)康水(shui)(shui)(shui)(shui)庫迎(ying)來建庫后(hou)最大(da)入庫洪(hong)(hong)水(shui)(shui)(shui)(shui)。洪(hong)(hong)水(shui)(shui)(shui)(shui)過(guo)程峰(feng)(feng)高量大(da),安(an)(an)康水(shui)(shui)(shui)(shui)庫充分發揮(hui)大(da)型(xing)水(shui)(shui)(shui)(shui)庫攔洪(hong)(hong)、錯(cuo)峰(feng)(feng)、削峰(feng)(feng)作用(yong),取得(de)了(le)顯著防洪(hong)(hong)減災效(xiao)益。
科學調度發揮顯著防洪減災效益
按(an)照省、市防(fang)指多次會商研究的調(diao)度方(fang)(fang)案,安(an)康(kang)水(shui)(shui)庫(ku)在(zai)漲水(shui)(shui)時提前預泄(xie)騰出(chu)(chu)防(fang)洪(hong)(hong)(hong)(hong)(hong)庫(ku)容(rong)、在(zai)洪(hong)(hong)(hong)(hong)(hong)峰段控制下(xia)(xia)(xia)泄(xie)量,為(wei)下(xia)(xia)(xia)游(you)(you)抗洪(hong)(hong)(hong)(hong)(hong)搶(qiang)險救災創(chuang)造了有利條件。經初(chu)步分析計算,這次漢江安(an)康(kang)段特(te)大洪(hong)(hong)(hong)(hong)(hong)水(shui)(shui)期間(jian),通(tong)過(guo)(guo)對安(an)康(kang)水(shui)(shui)庫(ku)及(ji)時、合理調(diao)度,實現了三(san)個(ge)方(fang)(fang)面(mian)的減災效果。一是(shi)通(tong)過(guo)(guo)削(xue)(xue)峰調(diao)節將可能進入安(an)康(kang)城區河段的25537秒(miao)立(li)米(mi)(mi)洪(hong)(hong)(hong)(hong)(hong)峰流量,削(xue)(xue)減至19178秒(miao)立(li)米(mi)(mi),削(xue)(xue)峰6359秒(miao)立(li)米(mi)(mi),降低下(xia)(xia)(xia)游(you)(you)安(an)康(kang)站洪(hong)(hong)(hong)(hong)(hong)峰水(shui)(shui)位達(da)3.9米(mi)(mi),避免了漢江安(an)康(kang)城區南北兩岸和下(xia)(xia)(xia)游(you)(you)旬(xun)陽、白河縣城發(fa)生慘重損失。二是(shi)通(tong)過(guo)(guo)錯峰調(diao)節將安(an)康(kang)站最大洪(hong)(hong)(hong)(hong)(hong)峰流量出(chu)(chu)現時間(jian),由18日(ri)18時推遲至18日(ri)23時,滯后5小時,為(wei)安(an)康(kang)東壩(ba)片區3萬余名群眾全(quan)部安(an)全(quan)撤離贏得寶貴時間(jian)。三(san)是(shi)通(tong)過(guo)(guo)水(shui)(shui)庫(ku)攔洪(hong)(hong)(hong)(hong)(hong)作用(yong)將洪(hong)(hong)(hong)(hong)(hong)水(shui)(shui)總量的28.7%,近5.36億立(li)方(fang)(fang)米(mi)(mi)洪(hong)(hong)(hong)(hong)(hong)水(shui)(shui)攔蓄在(zai)庫(ku)內,減小了進入下(xia)(xia)(xia)游(you)(you)河道(dao)洪(hong)(hong)(hong)(hong)(hong)水(shui)(shui)總量,有利于下(xia)(xia)(xia)游(you)(you)洪(hong)(hong)(hong)(hong)(hong)水(shui)(shui)平穩(wen)通(tong)過(guo)(guo),起到(dao)減少堤防(fang)臨洪(hong)(hong)(hong)(hong)(hong)壓力(li)的作用(yong)。
通過對(dui)安康水庫的科學調度,優化了(le)天然形態下的洪水形態,給漢江(jiang)安康段防洪搶險工作(zuo)帶來(lai)了(le)有效保障與轉變(bian),防洪減災作(zuo)用顯著。
目前(qian),水庫(ku)壩體(ti)穩定,運行良好。