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第274章 治理淮河

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    李辰稳固势力后,目光落在了常年被旱涝折腾得苦不堪言的淮河两岸。
    自打黄河抢了淮河的入海道,这位“搅局精”把淮河下游淤得严严实实,好好一条母亲河成了“翻脸精”——汛期雨水一多,淤泥堵着排不出去,两岸立马一片泽国,房倒屋塌颗粒无收;到了枯水期,河道断流农田龟裂,庄稼旱得卷叶,百姓要么逃荒要么守着干裂的土地叹气。看着淮河两岸百姓的窘境,李辰拍板:“治淮!既要让洪水顺顺当当奔大海,又要让旱田喝上淮河汤!”当即调派红警水利工程师牵头,照搬苏北灌溉工程的成熟路子,混搭“排洪、灌溉、蓄水”三板斧,兴修水利织密渠网,硬生生把这条“闹脾气”的淮河,改成了护佑两岸的“幸福河”。
    要说淮河的糟心事,全是黄河“抢道”惹的祸。当年宋朝为了抵御金兵入侵,黄河改道夺了淮河的入海通道,裹着满河泥沙一股脑灌进淮河,年复一年下来,淮河下游河床被淤得老高,成了“地上河”,就像条被堵住嗓子眼的巨龙,吐不出水也咽不下洪。
    更要命的是,淮河两岸地势平坦,河道淤塞后没了正经排水路,汛期一来,上游的水往下涌,下游堵得走不动,淮安、蚌埠、阜阳这些地方首当其冲,农田淹得能行船,百姓家里的锅碗瓢盆全漂在水上;可到了冬春旱季,淤高的河床存不住水,河里的水要么渗进地下,要么蒸发殆尽,两岸农田裂得能塞拳头,别说种庄稼,连喝水都得跑几里地挑。
    当地百姓编了句顺口溜:“淮河岁岁闹灾荒,涝了逃荒旱断肠,种一坡收一箩,十年倒有九年荒”,这话里全是泪。李辰派红警水利工程师带着测绘队去摸底,回来的报告满是实打实的糟心数据:淮河下游淤积泥沙最厚处达5米,河床比两岸农田高2-3米,汛期最大积水面积超2000万亩,年均受灾百姓超100万人;旱季时,皖北、苏北近3000万亩耕地缺水,粮食亩产不足百斤。更要命的是,水旱交替还带火了蝗灾,涝后积水滋生蝗虫,旱年缺粮百姓更难活命。
    红警工程师直言:“治淮的核心就两件事,一是把淤住的洪水送进大海,二是把淮河的水存住、引到旱田,参考苏北灌溉的‘渠网+枢纽+水库’路子,准能治好!”李辰当即拍板,治淮工程立马上马,定下“先排洪、再灌溉、后蓄水,标本兼治”的总方针,既要解当下之灾,更要保长远之安。
    李辰的治淮工程,可不是瞎挖渠乱修坝,全是红警工程师结合苏北灌溉经验,量身定制的制式方案,每一步都算得明明白白,核心就是“排得畅、引得匀、蓄得住”三板斧,精准对应淮河的淤、涝、旱三大难题。
    第一步先定排洪核心:挖通入海主渠,给洪水找条正经路。
    参考苏北灌溉总渠的走向,工程师敲定两条主干排洪渠,全按制式标准来:一条是苏北灌溉总渠淮河分渠,西起淮安洪泽湖,东至黄海滨海港,全长168公里,渠底宽80米、口宽120米、深6米,能承接淮河下游80%的洪水,设计排洪流量达800立方米/秒,洪水顺着渠直扑黄海,再也不会堵在两岸;另一条是皖北排洪支渠,从阜阳颍河接淮河干流,东至洪泽湖汇入主渠,解决皖北片区的排水难题,渠底宽50米、深4米,排洪流量300立方米/秒,专门化解阜阳、蚌埠的汛期积水。两条渠都按“上宽下窄、顺地势引流”设计,避开村庄与核心农田,还配套建了12座节制闸,汛期开闸泄洪,旱季关闸蓄水,堪称给淮河装了“智能水龙头”。
    第二步抓灌溉关键:织密渠网,让旱田喝上淮河水。以排洪主渠为骨架,辐射修建支渠、斗渠、农渠,像毛细血管一样扎进苏北、皖北的农田,参考苏北灌溉的渠网密度,做到“渠渠相通、田块连渠”:主渠接淮河干流,支渠通到乡镇,斗渠连到村组,农渠直接浇到地头,每万亩耕地配1条斗渠、10条农渠,确保旱季时,淮河水能顺着渠网流到每一块田。同时在渠网节点建8座提水站,采用红警系统的抽水设备,哪怕淮河水位低,也能把水提进渠网,彻底解决“水到不了地头”的难题,规划灌溉面积达4500万亩,覆盖苏北、皖北所有旱涝频繁区。
    第三步补蓄水兜底:建库筑坝,锁住雨水防旱涝。在淮河上游修建3座中型水库(梅山、响洪甸、佛子岭),下游加固洪泽湖大堤,把汛期多余的水存起来,旱季再放出来补渠网,做到“汛期蓄水、旱季补水”。水库按制式标准建设,坝高30-50米,总库容达15亿立方米,既能拦洪减涝,又能保障灌溉用水,还能顺带解决沿岸百姓的生活用水,一举三得。
    整套方案下来,排洪有渠、灌溉有网、蓄水有库,全是实打实的制式工程,工程师拿着图纸拍胸脯:“按这方案干,保准三年见效,淮河两岸再也不用怕旱涝!”
    治淮工程一开工,淮河两岸立马热闹起来,李辰延续之前基建的老法子:红警工程师掌
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