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農(nóng)牧部門30套智能田口精準(zhǔn)測(cè)流設(shè)備助力秋澆節(jié)水

2023-11-09 10:50:56 來(lái)源：內(nèi)蒙古巴彥淖爾農(nóng)牧 閱讀量：18569 評(píng)論

　　【農(nóng)機(jī)網(wǎng) 地方農(nóng)機(jī)】為全面貫徹習(xí)近平總書記在巴彥淖爾考察時(shí)關(guān)于“河套灌區(qū)要節(jié)約水資源”的重要指示精神，深入推進(jìn)河套灌區(qū)節(jié)水控水工作順利完成，內(nèi)蒙古巴彥淖爾市農(nóng)發(fā)中心整合項(xiàng)目資金，購(gòu)置智能田口精準(zhǔn)測(cè)流設(shè)備30套，精準(zhǔn)測(cè)定秋澆用水量。設(shè)備主要用于引黃灌區(qū)，分別在臨河區(qū)安裝8臺(tái)(狼山鎮(zhèn)2臺(tái)、城關(guān)鎮(zhèn)6臺(tái))，五原縣安裝15臺(tái)(和勝鄉(xiāng)8臺(tái)、銀定圖鎮(zhèn)4臺(tái)、塔爾湖鎮(zhèn)3臺(tái))，杭錦后旗安裝7臺(tái)(二道橋鎮(zhèn)5臺(tái)、市農(nóng)科所園子渠實(shí)驗(yàn)基地2臺(tái))。
 
　　該測(cè)流設(shè)備由閘門開關(guān)、超聲波渠道測(cè)流箱與太陽(yáng)能電路板組成，集精確的流量計(jì)算、數(shù)據(jù)采集、無(wú)線通信功能于一體，利用超聲波時(shí)差法原理，通過(guò)對(duì)瞬時(shí)流量和總流量的測(cè)定，提供精確的用水記錄。
 
　　其優(yōu)點(diǎn)有：一是采用流速面積法，無(wú)需刻意改變水的流態(tài)，水頭損失更小；二是采用時(shí)差法超聲波技術(shù)，每對(duì)換能器測(cè)量的是該層水流的平均流速，超聲波信號(hào)從測(cè)水箱的一側(cè)發(fā)射到另外一側(cè)接收，其時(shí)間差代表的是該層水流的平均流速，更能從整體上反應(yīng)水流的狀態(tài)，多層交叉排布的換能器，將過(guò)流斷面切割成多層，獲得多層的平均流速，又可抵減渠道中因紊流造成的計(jì)量不確定度，大大提高了渠道斷面平均流速數(shù)據(jù)的穩(wěn)定性和準(zhǔn)確度；三是具備過(guò)流斷面淤積高度檢測(cè)功能，并在流量計(jì)算時(shí)，抵減淤積造成的斷面面積，使得最終流量數(shù)據(jù)更逼近真值；四是采用多聲道測(cè)量技術(shù)，大幅度增加超聲波探頭的數(shù)量，每5-10厘米排布一層，分別測(cè)量斷面各層的流速，因此不同的坡降、不同復(fù)雜外部條件下均可以實(shí)現(xiàn)精確計(jì)量；五是依據(jù)流量計(jì)規(guī)范進(jìn)行校驗(yàn)，內(nèi)嵌多流態(tài)算法模型，無(wú)需現(xiàn)場(chǎng)校準(zhǔn)，徹底解決了過(guò)去現(xiàn)場(chǎng)校準(zhǔn)時(shí)真值獲取困難問(wèn)題。
 
　　今年，我市建立一關(guān)一放灌溉制度，推行“一把鍬”澆地模式，全面落實(shí)淺澆快輪，逐步壓減秋澆用水量。據(jù)統(tǒng)計(jì)，全市計(jì)劃秋澆面積為500萬(wàn)畝左右，耗水量控制在10億方以內(nèi)，畝均用水定額控制在120-200方，比往年縮減一半左右。因此秋澆水量測(cè)定的精準(zhǔn)與否決定著全市秋澆節(jié)水任務(wù)的落實(shí)。精準(zhǔn)測(cè)流箱不僅很好的解決了這個(gè)問(wèn)題，而且可用于來(lái)年春灌及生育期用水量的測(cè)定，對(duì)農(nóng)業(yè)用水精準(zhǔn)調(diào)控工作有著積極作用。
 
　　通過(guò)安裝應(yīng)用精準(zhǔn)測(cè)流箱與平地縮塊措施相結(jié)合，為今年秋澆定額工作提供了理論依據(jù)，為全市秋澆工作的順利進(jìn)行提供了保障。下一步，將繼續(xù)推廣精準(zhǔn)測(cè)流設(shè)備，更加精細(xì)調(diào)配農(nóng)業(yè)用水，為提高全市水資源利用效力，推動(dòng)農(nóng)業(yè)節(jié)本增效奠定基礎(chǔ)。

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