大化水(shui)(shui)庫位于大化瑤族(zu)自(zi)治縣紅(hong)水(shui)(shui)河(he)中游,距馬山縣8公(gong)里(li),到都安瑤族(zu)自(zi)治縣36公(gong)里(li)。水(shui)(shui)庫壩首(shou)以上集雨面積11.22萬平(ping)方公(gong)里(li),多年(nian)(nian)平(ping)均(jun)(jun)流量(liang)1900立(li)方米(mi)/秒(miao),平(ping)均(jun)(jun)含沙(sha)量(liang)0.72公(gong)斤/立(li)方米(mi),最大8.96公(gong)斤/立(li)方米(mi),年(nian)(nian)平(ping)均(jun)(jun)輸沙(sha)量(liang)達(da)4590萬噸(dun)。
水(shui)(shui)庫(ku)壩高78.5米(mi), 正常水(shui)(shui)位高程(cheng)155米(mi),庫(ku)容(rong)3.54億(yi)立(li)方米(mi),有效庫(ku)容(rong)2.84億(yi)立(li)方米(mi)。水(shui)(shui)庫(ku)上游與巖灘電站尾水(shui)(shui)相(xiang)銜接,水(shui)(shui)庫(ku)壅水(shui)(shui)渠化上游航道86.8公(gong)里,右岸(an)設有垂(chui)直(zhi)升(sheng)船機,設計年貨運量390萬噸,最大(da)通船250噸。
大化水庫以發(fa)電(dian)為主,屬河床式(shi)大流量(liang)(liang)水電(dian)站(zhan),第一期工程裝機容(rong)量(liang)(liang)40萬(wan)千(qian)(qian)(qian)瓦,保證出力(li)10.5萬(wan)千(qian)(qian)(qian)瓦,年(nian)平均(jun)發(fa)電(dian)量(liang)(liang)20.6億(yi)千(qian)(qian)(qian)瓦時。第二(er)期工程即梯級(ji)開(kai)發(fa)計劃,最(zui)終裝機容(rong)量(liang)(liang)為60萬(wan)千(qian)(qian)(qian)瓦,保證出力(li)31.93萬(wan)千(qian)(qian)(qian)瓦,年(nian)發(fa)電(dian)量(liang)(liang)32.6億(yi)千(qian)(qian)(qian)瓦時。