Kev Ua Haujlwm: Direct Drip Irrigation rau High-Sediment Yellow River Dej
Txhawm rau rhuav tshem cov peev txheej tsis muaj zog, cov kev daws teeb meem tseem ceeb nyob hauv kev tshawb fawb thiab thev naus laus zis. Raws li kev ua liaj ua teb yog cov neeg siv dej loj, kev nce qib hauv dej -txuag thev naus laus zis yog qhov tseem ceeb tshwj xeeb.
Kev ceev ntawm Agricultural Water Conservation
"Tuam Tshoj cov peev txheej dej yog qhov tsis sib xws hauv qhov chaw thiab sijhawm, thiab qhov tsis sib xws ntawm cov khoom siv thiab kev xav tau tshwj xeeb yog qhov tseem ceeb. Cov cheeb tsam sab qaum teb, uas tsuas muaj18%ntawm lub teb chaws cov peev txheej dej, dais lub luag haujlwm hnyav ntawm kev tsim khoom ntau dua60%ntawm lub teb chaws cov nplej, "hais tiasKang Shaozhong, Tus Thawj Coj ntawm National Key Laboratory of Efficient Utilization of Agricultural Water Resources at China Agricultural University.
Nyob rau hauv cov xwm txheej ntawm cov dej tsis txaus, ua kom muaj kev ruaj ntseg ntawm cov khoom noj hauv lub tebchaws thiab cov khoom siv ua liaj ua teb zoo yuav tsum tau siv cov dej ua liaj ua teb -txuag kev ntsuas los txhim kho kev siv dej thiab cov txiaj ntsig zoo. Kev ua liaj ua teb suav rau60%ntawm Tuam Tshoj cov dej siv tag nrho, sawv cev rau lub teb chaws lub peev xwm loj tshaj plaws rau kev txuag dej.
Kev daws lub Ntiaj Teb Puzzle ntawm Yellow River Drip Irrigation
Txhawm rau hais txog qhov kev sib tw uas cov ntsiab lus siab ntawm cov dej hauv Yellow River yooj yim clogs ncaj qha drip irrigation systems, National Key Laboratory ntawm Tuam Tshoj Agricultural University tau ua kev tshawb fawb mechanism los tsim kev tiv thaiv -clogging drip irrigation technologies thiab cov khoom series. Cov kev siv zog no tau ua kom yooj yim rau kev siv dav dav ntawm drip irrigation hauv cheeb tsam xws liHetao Irrigation District.
"Los ntawm kev sim kev tshawb fawb dav dav, peb tau txheeb xyuas cov laj thawj tshwj xeeb ntawm kev txhaws - txiav txim siab txog kev koom tes ntawm lub cev, tshuaj lom neeg, thiab lom neeg.PIV (Particle Image Velocimetry)flow ntsuas tshuab los saib xyuas seb cov dej txav li cas los ntawm cov drip emitters thiab txheeb xyuas qhov chaw uas muaj feem yuav tshwm sim. Raws li cov xwm txheej no, peb tau tsim los tiv thaiv -clogging thev naus laus zis thiab cov khoom lag luam, daws qhov kev sib tw thoob ntiaj teb ntawm kev tso dej ncaj qha los ntawm Dej Dej Dej, "Kang Shaozhong hais rau cov neeg sau xov xwm.
Lub hom phiaj phiaj xwm rau Southern Seasonal Scarcity
Hais txog kev tsis txaus dej raws caij nyoog ntsib los ntawm Tuam Tshoj yav qab teb, Kang ntseeg tias kev txuag dej yuav tsum tau txhawb nqa los ntawm kev tsim vaj tsev thiab kev tswj xyuas.
"Piv txwv li,Zigui County hauv Yichang, Hubei Province, saws subsurface drip irrigation kom ua tiav kev sib xyaw dej thiab chiv tswj. Los ntawm muab cov dej thiab cov as-ham tsim nyog thaum lub sij hawm tseem ceeb ntawm cov qoob loo loj hlob, lawv tau txhim kho cov khoom ua liaj ua teb zoo li citrus txiv hmab txiv ntoo. "
Decadal Progress hauv Irrigation Efficiency
Cov ntaub ntawv qhia tau hais tias dhau kaum xyoo dhau los, Tuam Tshoj tussiv tau zoo coefficient ntawm farmland irrigation dejtau nce los ntawm0.53-0.58 Nws, thiab cov qoob loo muaj peev xwm ib cubic meter ntawm irrigation dej tau nce los ntawm1.58 kg txog 1.8 kg.
Los ntawm kev kho dua tshiab thiab nthuav dav hauv cheeb tsam irrigation, dhau lawm60mn uantawm thaj chaw tshiab irrigation tau ntxiv,300mn uantawm thaj chaw irrigation uas twb muaj lawm tau raug txhim kho, thiab cov qoob loo muaj peev xwm ntau lawm tau nce los ntawm kwv yees li30 billion kg.