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西(xi)霞(xia)院水庫，是黃河小(xiao)(xiao)浪底水利(li)(li)樞紐(niu)的(de)(de)配套(tao)工程(cheng)，位于小(xiao)(xiao)浪底壩址(zhi)下游16公(gong)(gong)(gong)里(li)處的(de)(de)黃河干(gan)流上，距離洛陽市(shi)25公(gong)(gong)(gong)里(li)，離孟津縣城10公(gong)(gong)(gong)里(li)，離吉利(li)(li)區5公(gong)(gong)(gong)里(li)，離鄭州市(shi)116公(gong)(gong)(gong)里(li)。水庫的(de)(de)任務(wu)是以反(fan)調節為主(zhu)，結合發(fa)電(dian)，兼顧(gu)灌(guan)溉、供水等(deng)綜合利(li)(li)用(yong)。

工程布置及規模

西(xi)霞院反調節(jie)水庫主(zhu)要建筑物(wu)有(you)土石壩、泄(xie)洪閘、排(pai)沙(sha)(sha)閘、河床式電(dian)站(zhan)廠房、王(wang)(wang)莊引水閘、壩后(hou)灌溉引水閘及電(dian)站(zhan)安裝間(jian)下排(pai)沙(sha)(sha)洞(dong)(dong)等(deng)，壩軸線總(zong)長(chang)3122m，其(qi)中（泄(xie)洪、發電(dian)、引水）混凝土壩段長(chang)513m。泄(xie)水、發電(dian)建筑物(wu)集中布置在右(you)岸(an)灘地，共設置21孔(kong)泄(xie)洪閘，排(pai)沙(sha)(sha)建筑物(wu)包括(kuo)電(dian)站(zhan)廠房左側的(de)排(pai)沙(sha)(sha)洞(dong)(dong)、右(you)側的(de)排(pai)沙(sha)(sha)閘和機(ji)組之(zhi)間(jian)的(de)排(pai)沙(sha)(sha)底孔(kong)，王(wang)(wang)莊引水閘位(wei)于(yu)泄(xie)洪閘右(you)側，灌溉引水閘位(wei)于(yu)電(dian)站(zhan)下游左側岸(an)邊(bian)。

左右(you)岸(an)(an)灘(tan)地和河槽(cao)段為土工膜斜墻砂(sha)礫石壩(ba)(ba)(ba)，最(zui)大壩(ba)(ba)(ba)高(gao)20.2m，壩(ba)(ba)(ba)頂寬(kuan)8.0m，壩(ba)(ba)(ba)頂高(gao)程138.2m，上游(you)邊坡1:2.75，下游(you)邊坡1:2.25。其中(zhong)左岸(an)(an)（含河槽(cao)段）壩(ba)(ba)(ba)長(chang)1725.5m，右(you)岸(an)(an)壩(ba)(ba)(ba)長(chang)883.5m，砂(sha)礫石壩(ba)(ba)(ba)總長(chang)2609m。水電(dian)站為河床式廠(chang)房，最(zui)大高(gao)度為51.5m，設有(you)4臺單(dan)機(ji)容(rong)(rong)量(liang)為35 MW的軸流轉漿(jiang)式水輪發電(dian)機(ji)組，總裝(zhuang)機(ji)容(rong)(rong)量(liang)140MW，多年平均發電(dian)量(liang)5.83億kw.h。壩(ba)(ba)(ba)基防(fang)滲采用(yong)混凝土防(fang)滲墻。工程規模為大（2）型。

西(xi)霞(xia)院反調節(jie)水庫(ku)總庫(ku)容1.62億m3，正常蓄(xu)水位(wei)134m，汛(xun)期限(xian)制(zhi)水位(wei)131m。西(xi)霞(xia)院工程(cheng)主要工程(cheng)量(liang)為(wei)：土(tu)石方開挖730萬(wan)m3，混(hun)凝土(tu)防(fang)滲墻(qiang)9.8萬(wan)m2，混(hun)凝土(tu)85.3萬(wan)m3，大壩土(tu)石方填筑283.22萬(wan)m3，金屬結構8720t，鋼材4.6萬(wan)t。

投資與工期

工(gong)(gong)程概算總投資(zi)(zi)21.97億(yi)元(yuan)，其(qi)中由(you)(you)小浪(lang)底建管局籌資(zi)(zi)5億(yi)元(yuan)，其(qi)余部分(fen)由(you)(you)國(guo)家投資(zi)(zi)。前期(qi)準備工(gong)(gong)程從2003年(nian)(nian)元(yuan)月開工(gong)(gong)，工(gong)(gong)期(qi)1年(nian)(nian)；主體工(gong)(gong)程于2004年(nian)(nian)元(yuan)月開工(gong)(gong)，工(gong)(gong)期(qi)4.5年(nian)(nian)；2007年(nian)(nian)6月18日(ri)，首臺機組并網(wang)發電；2009年(nian)(nian)3月27日(ri)，工(gong)(gong)程6個專項(xiang)的(de)第一項(xiang)——消(xiao)防系統通過(guo)(guo)驗(yan)收(shou)；2009年(nian)(nian)7月15日(ri)，水土保持設施通過(guo)(guo)驗(yan)收(shou)。2011年(nian)(nian)3月2日(ri)，順利通過(guo)(guo)水利部組織的(de)竣工(gong)(gong)驗(yan)收(shou)。

工程移民

西(xi)霞(xia)院工程淹沒(mei)及影響人(ren)6181人(ren)，淹沒(mei)土地30156.8畝，施工占壓土地8025.65畝。

工程特點

1、反(fan)調(diao)(diao)(diao)節運用。西霞院水(shui)庫(ku)通過(guo)對(dui)小浪底(di)水(shui)電(dian)(dian)(dian)站(zhan)調(diao)(diao)(diao)峰發(fa)(fa)電(dian)(dian)(dian)的不穩定流進(jin)行再調(diao)(diao)(diao)節，使下(xia)泄水(shui)流均勻穩定，減少下(xia)游(you)河(he)(he)床的擺動，減輕對(dui)下(xia)游(you)堤(di)防等防護工(gong)程的沖刷。當小浪底(di)發(fa)(fa)電(dian)(dian)(dian)流量較大(da)時，西霞院水(shui)庫(ku)按(an)反(fan)調(diao)(diao)(diao)節流量要求發(fa)(fa)電(dian)(dian)(dian)，多余水(shui)量存(cun)于(yu)庫(ku)中(zhong)，或根據(ju)需要調(diao)(diao)(diao)峰發(fa)(fa)電(dian)(dian)(dian)；當小浪底(di)水(shui)電(dian)(dian)(dian)站(zhan)停(ting)機時，利用庫(ku)中(zhong)存(cun)水(shui)按(an)反(fan)調(diao)(diao)(diao)節水(shui)量下(xia)泄，滿足黃河(he)(he)下(xia)游(you)河(he)(he)段(duan)的工(gong)農業用水(shui)要求。

2、壩體采用(yong)復合(he)(he)土(tu)(tu)工(gong)膜防(fang)(fang)滲。以復合(he)(he)土(tu)(tu)工(gong)膜代替粘(zhan)(zhan)土(tu)(tu)心(xin)墻防(fang)(fang)滲，減少(shao)粘(zhan)(zhan)土(tu)(tu)料場，少(shao)占(zhan)耕地，節約投(tou)資。

3、地基處(chu)理(li)(li)難度(du)大(da)。由于西(xi)霞院水庫大(da)壩(ba)(ba)(ba)坐落在黃(huang)河多年(nian)淤積的(de)砂礫石層上，壩(ba)(ba)(ba)基處(chu)理(li)(li)難度(du)很(hen)大(da)。西(xi)霞院水庫的(de)發電和泄洪(hong)壩(ba)(ba)(ba)段為混凝土壩(ba)(ba)(ba)，坐落在黃(huang)河多年(nian)沉積的(de)軟巖上。如何處(chu)理(li)(li)好(hao)51.5m高的(de)混凝土壩(ba)(ba)(ba)基礎，這是擺在設(she)計人員、施工人員和建設(she)管理(li)(li)者面前的(de)嚴峻(jun)課題(ti)。

西(xi)霞院(yuan)水(shui)(shui)(shui)庫(ku)(ku)建(jian)成后，將(jiang)大(da)大(da)改善黃(huang)河下(xia)游(you)供(gong)水(shui)(shui)(shui)條件，減(jian)少黃(huang)河下(xia)游(you)斷(duan)流(liu)的發生，可(ke)(ke)以在(zai)下(xia)游(you)發展灌溉面積113.8萬畝，每年還可(ke)(ke)以向(xiang)附近城鎮供(gong)水(shui)(shui)(shui)10019萬立(li)方(fang)米(mi)。另外(wai)，西(xi)霞院(yuan)水(shui)(shui)(shui)庫(ku)(ku)平均(jun)年發電量5.83億度(du)。 據了解，西(xi)霞院(yuan)水(shui)(shui)(shui)庫(ku)(ku)深度(du)為(wei)51.5米(mi)，每年進行(xing)調水(shui)(shui)(shui)調沙時，排泄(xie)孔敞開下(xia)泄(xie)，泥沙不(bu)會淤積，也(ye)不(bu)會妨礙下(xia)游(you)打撈“流(liu)魚”。另外(wai)，2008年北京奧運會期間，西(xi)霞院(yuan)水(shui)(shui)(shui)庫(ku)(ku)還將(jiang)作(zuo)為(wei)南水(shui)(shui)(shui)北調中線工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)備(bei)用水(shui)(shui)(shui)源。很多大(da)型水(shui)(shui)(shui)利(li)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)都有反調節工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)，比如三峽(xia)水(shui)(shui)(shui)利(li)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)配套的反調節工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)是(shi)葛洲(zhou)(zhou)壩(ba)。不(bu)過(guo)三峽(xia)水(shui)(shui)(shui)利(li)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)是(shi)先建(jian)反調節工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)葛洲(zhou)(zhou)壩(ba)，而小浪底工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)是(shi)后建(jian)反調節工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)西(xi)霞院(yuan)水(shui)(shui)(shui)。