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首页> 外文期刊>Zeitschrift fur Bewasserungswirtschaft >Effect of injected water volume on ASR cavity well recovery behavior
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Effect of injected water volume on ASR cavity well recovery behavior

机译：注水量对ASR型腔井采收行为的影响

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摘要

In semi-arid areas, "Aquifer Storage Recovery" (ASR) wells are a promising new technology to store surface water during the rainy season and to recover and utilize it in the dry season. A better understanding of the factors affecting the recovery behavior of ASR wells will help to reduce the salinity of the recovered groundwater. which is often used for irrigation purposes. Three different volumes of canal water (128.4. 345.6, 2520 m~3) were injected in successive cycles of injection and recovery ina brackish groundwater aquifer using a retrofitted cavity type ASR well. Clogging of the aquifer was not observed up to a sedimentation load of 900 mg/L. The cavity of the ASR well was redeveloped automatically during the recovery phase. In each ASR cycles, native water mixing percentage of the total water injected increased with the recovered water percentage of the total water injected (I). Recovery efficiency increased with the volume of injected water. The mixing percentages at I=100 for Cl were 13.4, 12.6 and 20.6 for first, second and third ASR cycle. Calcite of the aquifer was dissolved by reacting with injected canal water of lower pH, releasing on average 1.12 mmol_c Ca~+ per liter in recovered water. Some of the additionally released CO_3~(2-) and HCO, from calcite dissolution were broken to CO, gas. The K~+ release from aquifer was 0.06 mmol_c L~(-1). Our results show that the ASR technology can be adapted for improving the quality of irrigation water when the native grondwater is brackish.Moreover, this technique may help to increase the conjunctive use of surface and groundwater on the way to a sustainable agriculture in India where cavity wells are most prevalent.
机译：在半干旱地区，“含水层存储恢复”（ASR）井是一种很有前途的新技术，可以在雨季存储地表水，并在干旱季节恢复和利用它。更好地了解影响ASR井采收行为的因素将有助于降低采出地下水的盐度。通常用于灌溉目的。使用改良型腔式ASR井，在咸咸含水层中连续注入和回收，注入了三种不同体积的运河水（128.4。345.6，2520 m〜3）。直到900 mg / L的沉降量，都没有观察到含水层的堵塞。 ASR井的腔在恢复阶段会自动重新开发。在每个ASR循环中，注入的总水的天然水混合百分比随着注入的总水的回收水百分比的增加而增加（I）。回收效率随注入水量的增加而增加。对于I，100，Cl的混合百分比对于第一，第二和第三ASR循环为13.4、12.6和20.6。含水方解石通过与注入的较低pH的渠道水反应而溶解，在回收的水中平均每升释放1.12 mmol_c Ca〜+。从方解石溶解中释放出来的一些CO_3〜（2-）和HCO被分解为CO气体。从含水层中释放出的钾离子为0.06 mmol_c L〜（-1）。我们的研究结果表明，当当地的苦咸水微咸时，ASR技术可以用于改善灌溉水的质量，此外，该技术还可以帮助印度在有腔的可持续农业的道路上增加地表水和地下水的联合使用。井是最普遍的。

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