Analysing the effects of soil properties changes associated with land use changes on the simulated water balance:: A comparison of three hydrological catchment models for scenario analysis
Analysing the effects of soil properties changes associated with land use changes on the simulated water balance:: A comparison of three hydrological catchment models for scenario analysis
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DOI：
10.1016/j.ecolmodel.2007.07.004
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发表时间：
2007-11-24
影响因子：
3.1
通讯作者：
Huisman, Johan A.
中科院分区：
文献类型：
--
作者：
Bormann, Helye;Breuer, Lutz;Huisman, Johan A.
本文介绍了LUCHEM框架内的模型比较研究的结果（“评估土地利用变化对水文的影响，通过围隔建模”），土地利用变化对流域水平衡的影响进行了评估与各种水文流域模型。LUCHEM这一部分的动机是，众所周知，土地利用的变化可能引起土壤化学和土壤物理性质的变化（如容重）。不幸的是，土地利用变化对土壤水力特性的影响很少直接调查，但一些关于容重变化的信息是可用的。容重的变化可以作为土壤传递函数的输入，以获得土壤水力模型参数的变化。在这项研究中，三种不同的集水模型（SWAT，TOPLATS，WASIM）进行了比较，就其对土地利用变化的敏感性，并没有考虑相关的土壤参数化的变化。结果表明，不同的模式表现出不同的敏感性，在土壤参数化的变化，而在模拟蒸散量和流量的绝对变化的幅度是相似的。SWAT计算了德国中尺度流域水平衡的最大变化。TOPLATS还显示，在计算的集水区水量平衡以及径流产生的显着变化，而WASIM反应最不敏感。虽然TOPLATS和WASIM在所有子流域和土地利用情景的水流变化方面显示出相似的模式，但SWAT结果在不同流域相似，但显示出特定情景的模式。关于土地利用变化对模拟水流的影响程度，考虑土壤变化影响的重要性取决于情景定义和模型对土壤参数化的敏感性。对于两个三个土地利用情景代表一个集约化的土地利用，SWAT和TOPLATS模拟水平衡的变化在同一数量级，由于土地利用和土壤性质的变化。因此，建议在土地利用变化情景分析中考虑土壤性质的变化。未来的实地工作需要旨在验证土壤水文特性对土地利用变化的假设依赖性。(C)2007 Elsevier B.V.保留所有权利。
This paper presents results of a model comparison study within the LUCHEM framework ('assessing the impact of Land Use Change on Hydrology by Ensemble Modelling') where the effects of land use change on catchment water balances were assessed with various hydrological catchment models. The motivation for this part of LUCHEM is that it is well known that land use changes may induce changes in soil chemical and soil physical properties (e.g. bulk density). Unfortunately the effects of land use change on soil hydraulic properties are seldom investigated directly, but some information on changes in bulk density is available. Changes in bulk density can be used as input for pedotransfer functions to derive changes in soil hydraulic model parameters. In this study, three different catchment models (SWAT, TOPLATS, WASIM) are compared with respect to their sensitivity to land use change with and without consideration of associated changes in soil parameterisation. The results reveal that different models show a different sensitivity to the change in soil parameterisation while the magnitude of absolute changes in simulated evapotranspiration and discharge is similar. SWAT calculates largest changes in the water balance in a German mesoscale catchment. TOPLATS also shows significant changes in the calculated catchment water balances as well as in the runoff generation while WASIM reacts least sensitive. While TOPLATS and WASIM show similar patterns with respect to changes in the water flows for all subcatchments and land use scenarios, SWAT results are similar for the different catchments, but show scenario specific patterns. In relation to the magnitude of the effects on simulated water flows induced by land use change, the significance of considering soil change effects depends on both, the scenario definition and on the model sensitivity to soil parameterisation. For two of the three land use scenarios representing an intensified land use, SWAT and TOPLATS simulate water balance changes in the same order of magnitude due to both, land use and soil property changes. Therefore, a consideration of changes in soil properties as part of land use change scenario analysis is recommended. Future field work needs to aim at the validation of the assumed dependency of soil hydrologic properties on land use change. (C) 2007 Elsevier B.V. All rights reserved.