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首页> 外文期刊>Journal of Hydrology >Modeling oasis dynamics driven by ecological water diversion and implications for oasis restoration in arid endorheic basins
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Modeling oasis dynamics driven by ecological water diversion and implications for oasis restoration in arid endorheic basins

机译：生态进水驱动的绿洲动力学和干旱地区盆地绿洲恢复的影响

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To achieve sustainable development, ecological water diversion has been implemented as a management tool to recover degraded oasis ecosystems in arid endorheic basins. Aiming to explore oasis response and identify appropriate objectives for oasis restoration, this study used a conceptual lumped ecohydrological model. Qingtu Oasis in the Shiyang River basin, Northwest China, was used as a case study to test this model. The model coupled groundwater budget, oasis response, and evapotranspiration dynamic modules. The model structure was clear and reasonable, and the calculation was of low cost. The application in Qingtu Oasis verified the model's effectiveness. The model was able to effectively capture the ecohydrological response attributed to the recovering of Qingtu Oasis in response to ecological water diversions occurring during the last decade. Combined with scenario analysis, the simulation indicated that Qingtu Oasis was fragile and largely dependent on ecological water diversion. Ecological responses were positive and non-linearly correlated with water input, resulting in an optimal water input that produced maximum water benefit by minimum water consumption. The ideal point method was useful in identifying this cost-effective water volume for oasis restoration. For Qingtu Oasis, the optimal water diversion was 45 million m(3), which would recover the oasis to 29.16 km(2) with an NDVI of 0.41. The current oasis conditions approach the optimal status, and ecological water diversion was suggested to continue and maintain the current oasis status. The volume of 45 million m(3) could be taken as an upper threshold of water diversion, because above this threshold, water consumption would not result in water benefits effectively. This study proposed a practical tool for ecohydrological process simulation.
机译：为了实现可持续发展，生态调水作为一种管理手段被实施，以恢复干旱内陆盆地退化的绿洲生态系统。为了探索绿洲响应并确定合适的绿洲恢复目标，本研究采用了概念性的集总生态水文模型。以西北石羊河流域的青土绿洲为例，对该模型进行了验证。该模型耦合了地下水收支、绿洲响应和蒸散动态模块。模型结构清晰合理，计算成本低。在青土绿洲的应用验证了该模型的有效性。该模型能够有效地捕捉到过去十年中发生的生态改道对青土绿洲恢复的生态水文响应。结合情景分析，模拟结果表明，青图绿洲脆弱，在很大程度上依赖于生态调水。生态响应与水分输入呈正相关，且呈非线性关系，由此得出最佳水分输入，以最小的耗水量产生最大的水效益。理想点法有助于确定绿洲恢复的成本效益水量。对于青图绿洲而言，最佳引水量为4500万m（3），这将使绿洲恢复到29.16 km（2），NDVI为0.41。绿洲现状已接近最佳状态，建议生态调水继续维持绿洲现状。4500万m（3）的水量可以作为调水的上限，因为超过这个上限，用水不会有效地带来水效益。本研究为生态水文过程模拟提供了一个实用工具。

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