概述
陜南漢(han)江流域(yu)出現(xian)了一次(ci)大(da)范圍(wei)、高強度(du)降水(shui)過程(cheng)(cheng)。降雨引起江漢(han)干支流漲水(shui),漢(han)江安康水(shui)庫(ku)入(ru)庫(ku)洪(hong)(hong)峰(feng)達到50年(nian)一遇,安康水(shui)庫(ku)迎(ying)來(lai)建庫(ku)后最大(da)入(ru)庫(ku)洪(hong)(hong)水(shui)。洪(hong)(hong)水(shui)過程(cheng)(cheng)峰(feng)高量大(da),安康水(shui)庫(ku)充(chong)分發揮(hui)大(da)型水(shui)庫(ku)攔洪(hong)(hong)、錯峰(feng)、削峰(feng)作用,取得了顯著防洪(hong)(hong)減(jian)災效益。
科學調度發揮顯著防洪減災效益
按(an)照省、市(shi)防(fang)指多(duo)次會商研究的(de)調(diao)度方(fang)案,安(an)康(kang)(kang)水(shui)庫在漲水(shui)時提前預泄(xie)騰出防(fang)洪(hong)(hong)(hong)(hong)庫容、在洪(hong)(hong)(hong)(hong)峰(feng)段控制下(xia)泄(xie)量,為下(xia)游(you)(you)抗洪(hong)(hong)(hong)(hong)搶(qiang)險救災(zai)(zai)創造了(le)(le)有利(li)條件。經初步分析計算(suan),這次漢江(jiang)安(an)康(kang)(kang)段特大(da)洪(hong)(hong)(hong)(hong)水(shui)期(qi)間(jian)(jian),通過對安(an)康(kang)(kang)水(shui)庫及(ji)時、合(he)理(li)調(diao)度,實(shi)現了(le)(le)三個方(fang)面的(de)減(jian)災(zai)(zai)效果(guo)。一是通過削峰(feng)調(diao)節(jie)將(jiang)可能(neng)進入(ru)安(an)康(kang)(kang)城(cheng)區(qu)(qu)河段的(de)25537秒(miao)立(li)米(mi)洪(hong)(hong)(hong)(hong)峰(feng)流(liu)量,削減(jian)至(zhi)19178秒(miao)立(li)米(mi),削峰(feng)6359秒(miao)立(li)米(mi),降低下(xia)游(you)(you)安(an)康(kang)(kang)站洪(hong)(hong)(hong)(hong)峰(feng)水(shui)位達3.9米(mi),避免了(le)(le)漢江(jiang)安(an)康(kang)(kang)城(cheng)區(qu)(qu)南北兩岸和(he)下(xia)游(you)(you)旬陽、白河縣城(cheng)發(fa)生(sheng)慘(can)重損失。二是通過錯峰(feng)調(diao)節(jie)將(jiang)安(an)康(kang)(kang)站最大(da)洪(hong)(hong)(hong)(hong)峰(feng)流(liu)量出現時間(jian)(jian),由18日18時推遲至(zhi)18日23時,滯后5小時,為安(an)康(kang)(kang)東壩(ba)片(pian)區(qu)(qu)3萬(wan)余名群眾全部安(an)全撤離贏得寶貴時間(jian)(jian)。三是通過水(shui)庫攔(lan)(lan)洪(hong)(hong)(hong)(hong)作(zuo)用(yong)將(jiang)洪(hong)(hong)(hong)(hong)水(shui)總量的(de)28.7%,近5.36億立(li)方(fang)米(mi)洪(hong)(hong)(hong)(hong)水(shui)攔(lan)(lan)蓄(xu)在庫內(nei),減(jian)小了(le)(le)進入(ru)下(xia)游(you)(you)河道洪(hong)(hong)(hong)(hong)水(shui)總量,有利(li)于(yu)下(xia)游(you)(you)洪(hong)(hong)(hong)(hong)水(shui)平穩(wen)通過,起到減(jian)少堤防(fang)臨洪(hong)(hong)(hong)(hong)壓力的(de)作(zuo)用(yong)。
通過對安康水庫的科(ke)學(xue)調度,優化了天(tian)然形態下(xia)的洪(hong)水形態,給漢江安康段防(fang)洪(hong)搶險(xian)工作(zuo)帶來了有效保障與(yu)轉變,防(fang)洪(hong)減災作(zuo)用顯著。
目前,水庫(ku)壩體(ti)穩(wen)定,運行良好(hao)。