Ecohydrological evolution model on riparian vegetation in hyperarid regions and its validation in the lower reach of Tarim River
Ecohydrological evolution model on riparian vegetation in hyperarid regions and its validation in the lower reach of Tarim River
复制标题
塔里木河下游极度干旱地区河岸植被生态水文演化模型及其验证
DOI：
10.1002/hyp.8313
复制
发表时间：
2012-06
影响因子：
3.2
通讯作者：
Cong, Zhentao
中科院分区：
文献类型：
--
作者：
Tian, Fuqiang;Hu, Heping;Lin, Mu;Cong, Zhentao
在外部气候强迫和植被与水文之间的内部反馈驱动下的生态水文系统的演化在干旱和半干旱地区更为显著，近年来引起了大量的研究关注。对生态水文系统演化研究中所使用的最新假设和动力学方程进行批判性的考察，应遵循由简单到复杂的规律。极端干旱区（如塔里木河下游）河岸植被生态水文系统由于其简单性，可以作为研究的出发点，这一点以前很少从系统演化的角度进行研究。此外，2000 - 2006年塔里木河下游调水实践为模型验证提供了有价值的原型试验。这是因为该地区地下水和植被的显著变化发生在较短的时间内，因此很容易观察到。通过耦合地下水运动和植被动态，建立了超干旱区河岸带植被生态水文演化模型（ERV模型）。在ERV模型中，地下水位作为一个关键的反馈变量，决定了植被的动态（殖民化和死亡率），是由植被蒸腾而不是地下水运动。通过威尔斯监测的地下水位和卫星观测的中分辨率成像光谱仪的植被覆盖率用于模型验证。仿真结果表明，未标定参数的ERV模型具有良好的性能。它也使用多目标方法手动校准，微调后的参数接近未校准的参数，表明模型的鲁棒性。分析进一步表明，蒸散量的增加主要是由于水分转移，从而植被生长，这意味着生态水文耦合的长期水文模拟的重要性。版权所有© 2011约翰威利父子有限公司.
The evolution of the ecohydrological system driven by external climatic forcing and internal feedbacks between vegetation and hydrology, which is more remarkable in arid and semiarid regions, has attracted substantial research attention in recent years. To examine critically the state‐of‐the‐art assumptions and dynamic equations used in the evolution study of an ecohydrological system, the rule of proceeding from simplicity to complexity should be followed. The riparian vegetation ecohydrological system in hyperarid regions (e.g. the lower Tarim River) can serve as a starting point given its simplicity, which has been seldom examined before in terms of system evolution. Further, the water transfer practice from 2000 to 2006 in the lower Tarim River serves as a valuable prototype experiment for model validation. This is because the remarkable changes in groundwater and vegetation in the area have taken place within a shorter period and thus can be easily observed. In the present study, the ecohydrological evolution model on riparian vegetation (ERV model) in hyperarid regions was proposed by coupling groundwater movement and vegetation dynamics. In the ERV model, the groundwater table serves as a critical feedback variable that determines the vegetation dynamics (colonization and mortality) and is determined by vegetation transpiration other than groundwater movement. The monitored groundwater table by wells and satellite‐observed vegetation coverage from the Moderate Resolution Imaging Spectroradiometer are used for model validation. The simulation results show the good performance of the ERV model with uncalibrated parameters. It was also calibrated manually using a multiobjective method, and the fine‐tuned parameters are close to the uncalibrated ones, indicating the robustness of the model. The analysis shows further that the increased evapotranspiration is substantially due to the water transfer and thus the vegetation growth, which implies the importance of ecohydrological coupling for long‐term hydrological modelling. Copyright © 2011 John Wiley & Sons, Ltd.
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影响因子：
15
作者：
D. Zasłavsky
通讯作者：
D. Zasłavsky
影响因子：
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作者：
Dong Xin-guang
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DOI：
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发表时间：
2010-02
期刊：
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影响因子：
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作者：
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通讯作者：
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DOI：
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发表时间：
2003
期刊：
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影响因子：
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作者：
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通讯作者：
A. Warrick
影响因子：
6.1
作者：
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通讯作者：
Carpenter, SR