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首页> 外文期刊>Journal of Hydrology: Regional Studies >Multi-year surface radiative properties and vegetation parameters for hydrologic modeling in regions of complex terrain—Methodology and evaluation over the Integrated Precipitation and Hydrology Experiment 2014 domain
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Multi-year surface radiative properties and vegetation parameters for hydrologic modeling in regions of complex terrain—Methodology and evaluation over the Integrated Precipitation and Hydrology Experiment 2014 domain

机译：复杂地形区域水文建模的多年地表辐射特性和植被参数—“降水与水文综合实验2014”领域的方法与评价

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Study regionSoutheast US (SE US).Study focusThis study probes the propagation of errors in standard remote-sensing vegetation products caused by cloud contamination and the impact of time-variant radiative properties for correctly describing land-surface properties in hydrologic models. Spatiotemporally-varying quality-controlled vegetation attributes (i.e., leaf area index and fractional vegetation coverage) and surface radiative properties (i.e., longwave broadband emissivity and shortwave broadband albedo) were derived from MODIS (Moderate Resolution Imaging Spectroradiometer) products over the SE US at 1?km?×?1?km and hourly resolutions from 2007 to 2013. The data sets are publicly available. The impact of uncorrected standard vegetation products and static treatments of radiative properties was assessed systematically clearly illustrating improvements in simulated water and energy fluxes using the developed landscape attributes with a fully-distributed uncalibrated hydrologic model.New hydrological insights for the regionThrough simulations in the Southern Appalachian Mountains, we found that the spatiotemporal variability of radiative properties significantly influences the diurnal cycle of the surface energy budget with marked differences in sensible heat fluxes (up to 10–20%). Better performance of streamflow simulations achieved by using the improved vegetation attributes is tied to changes in rainfall interception and evapotranspiration, reflecting the importance of SE forests in the regional water cycle. The largest improvements in streamflow simulations result from larger corrections to MODIS products in the inner mountain region where cloudiness is persistent.
机译：研究区域美国东南部（SE US）。研究重点本研究探讨了由云污染引起的标准遥感植被产品中误差的传播以及时变辐射特性的影响，以便在水文模型中正确描述地表特性。时空变化的质量控制的植被属性（即，叶面积指数和植被覆盖率）和表面辐射特性（即，长波宽带发射率和短波宽带反照率）来自于美国东南部的MODIS（中等分辨率成像光谱仪）产品2007年至2013年的小时分辨率为1？km？×？1？km。数据集可公开获得。系统地评估了未校正的标准植被产品和辐射特性的静态处理的影响，清楚地说明了使用已开发的景观属性和完全分布的未校正水文模型对模拟水和能量通量的改善。该区域的新水文见解通过南阿巴拉契亚地区的模拟在山区，我们发现辐射特性的时空变化显着影响了表面能收支的昼夜循环，显热通量存在明显差异（高达10％至20％）。通过使用改良的植被属性实现的水流模拟更好的性能与降雨截留和蒸散量的变化有关，这反映了东南部森林在区域水循环中的重要性。流量模拟的最大改进来自对持续多云的内山区MODIS产品的较大修正。

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