首页> 美国政府科技报告 >Distributed Assimilation of Satellite-based Snow Extent for Improving Simulated Streamflow in Mountainous, Dense Forests: An Example Over the DMIP2 Western Basins.

【24h】

Distributed Assimilation of Satellite-based Snow Extent for Improving Simulated Streamflow in Mountainous, Dense Forests: An Example Over the DMIP2 Western Basins.

机译：基于卫星的雪域分布式同化改善山区密集森林的模拟河流流量：以DmIp2西部盆地为例。

获取原文

页面导航

摘要
著录项
相似文献
相关主题

摘要

Snow cover area affects snowmelt, soil moisture, evapotranspiration, and ultimately streamflow. For the Distributed Model Intercomparison Project - Phase 2 Western basins, we assimilate satellite-based fractional snow cover area (fSCA) from the Moderate Resolution Imaging Spectroradiometer, or MODIS, into the National Weather Service (NWS) SNOW-17 model. This model is coupled with the NWS Sacramento Heat Transfer (SAC-HT) model inside the National Aeronautics and Space Administration's (NASA) Land Information System. SNOW-17 computes fSCA from snow water equivalent (SWE) values using an areal depletion curve. Using a direct insertion, we assimilate fSCAs in two fully distributed ways: 1) we update the curve by attempting SWE preservation, and 2) we reconstruct SWEs using the curve. The preceding are refinements of an existing simple, conceptually-guided NWS algorithm. Satellite fSCA over dense forests inadequately accounts for below-canopy snow, degrading simulated streamflow upon assimilation during snowmelt. Accordingly, we implement a below-canopy allowance during assimilation. This simplistic allowance and direct insertion are found to be inadequate for improving calibrated results, still degrading them as mentioned above. However, for streamflow volume for the uncalibrated runs, we obtain: (1) substantial to major improvements (64-81 %) as a percentage of the control run residuals (or distance from observations), and (2) minor improvements (16-22 %) as a percentage of observed values. We highlight the need for detailed representations of canopy-snow optical radiative transfer processes in mountainous, dense forest regions if assimilation-based improvements are to be seen in calibrated runs over these areas.

著录项

作者
Yatheendradas, S.; Peters-Lidard, C. D.; Koren, V.; Cosgrove, B. A.; DeGoncalves, L. G. D.; Smith, M.; Geiger, J.; Cui, Z.; Borak, J.; Kumar, S. V.; Riggs, G.; Mizukami, N.;
展开▼
作者单位

展开▼
年度 2012
页码 1-59
总页数 59
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Drainage; Forests; Mountains; Snow; Snow cover; Simulation; Hydrology models; Environment models; Satellite observation; Modis(Radiometry); Radiative transfer; Soil moisture; Water;

机译：排水;森林;山地;雪;积雪;模拟;水文模型;环境模型;卫星观测; modis（辐射测量）;辐射传输;土壤湿度;水;

相似文献

外文文献
中文文献
专利

1. Distributed assimilation of satellite-based snow extent for improving simulated streamflow in mountainous, dense forests: An example over the DMIP2 western basins [J] . Soni Yatheendradas, Christa D. Peters Lidard, Victor Koren, Water resources research . 2012,第9期

机译：卫星降雪程度的分布式同化，以改善山区茂密森林中的模拟水流：以DMIP2西部盆地为例
2. Incorporating snow model and snowmelt runoff model for streamflow simulation in a snow-dominated mountainous basin in the western Hindukush-Himalaya region [J] . Abdul Haseeb Azizi, Yoshihiro Asaoka Hydrological Research Letters . 2020,第1期

机译：在西部雪地山地盆地中融入雪模型和雪花径流模型，在西部海滨喜马拉雅地区区域
3. Ensemble Streamflow Forecasting Using an Energy Balance Snowmelt Model Coupled to a Distributed Hydrologic Model with Assimilation of Snow and Streamflow Observations [J] . Gichamo Tseganeh Z., Tarboton David G. Water resources research . 2019,第12期

机译：使用能量平衡Snowmelt模型与分布式水文模型结合对雪和水流观测的吸收，进行集合水流预测
4. Integration of satellite-based passive microwave brightness temperature observations and an ensemble-based land data assimilation framework to improve snow estimation in forested regions [C] . Yuan Xue, Barton A. Forman 2017 IEEE International Geoscience and Remote Sensing Symposium . 2017

机译：将基于卫星的被动微波亮度温度观测与基于集合的土地数据同化框架相结合，以改善森林地区的降雪估计
5. Evaluation of Simulated Snow and Snowmelt Timing in the Community Land Model Using Satellite-based Products and Streamflow Observations [O] . Ally M. Toure, Kari Luojus, Matthew Rodell, -1

机译：利用卫星产品和水流观测值评估社区土地模型中的模拟雪和融雪时间
6. Distributed Assimilation of Satellite-based Snow Extent for Improving Simulated Streamflow in Mountainous, Dense Forests: An Example Over the DMIP2 Western Basins [O] . Smith, Michael, Kumar, Sujay V., Geiger, James, 2012

机译：基于卫星的雪域分布同化以改善山区茂密森林中的模拟水流：以DMIP2西部盆地为例

Distributed Assimilation of Satellite-based Snow Extent for Improving Simulated Streamflow in Mountainous, Dense Forests: An Example Over the DMIP2 Western Basins.

摘要

著录项

相似文献

相关主题

期刊订阅