نتایج جستجو برای: daily streamflow

تعداد نتایج: 200787  

2015
Chong Jiang Linbo Zhang Daiqing Li Fen Li Yingkui Li

In this research, monthly hydrological and daily meteorological data were collected across China for the period 1956–2012. Modified Mann–Kendall tests, double mass curve analysis, and correlation statistics were performed to identify the long-term trends and interrelation of the hydrometeorological variables and to examine the influencing factors of streamflow and sediment. The results are as f...

2010
Zhaohua Dai Carl C. Trettin Changsheng Li Devendra M. Amatya Ge Sun

A physically based distributed hydrological model, MIKE SHE, was used to evaluate the effects of altered temperature and precipitation regimes on the streamflow and water table in a forested watershed on the southeastern Atlantic coastal plain. The model calibration and validation against both streamflow and water table depth showed that the MIKE SHE was applicable for predicting the streamflow...

Journal: :آب و خاک 0
زارعی زارعی حبیب نژاد روشن حبیب نژاد روشن شاهدی شاهدی قنبرپور قنبرپور

abstract major of hydrological systems are very complicated and it is not possible to understand them completely, therefore simplification is necessary to understand or control of a part of the system behavior such as water balance relationships. hydrological models are simple structure of complicated systems in water cycle in the nature. the first goal of a hydrological model is function predi...

2007
V. J. Bidwell

Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract The proportion and origin of groundwater contribution to streamflow from agricultural catchments is relevant to estimation of the effects of nitrate leached from the soil on the quality of surface waters. This study addresses the partition...

Journal: :Remote Sensing 2017
Fei Yuan Limin Zhang Khin Wah Wah Win Liliang Ren Chongxu Zhao Yonghua Zhu Shanhu Jiang Yi Liu

Satellite precipitation products from the Global Precipitation Measurement (GPM) mission and its predecessor the Tropical Rainfall Measuring Mission (TRMM) are a critical data source for hydrological applications in ungauged basins. This study conducted an initial and early evaluation of the performance of the Integrated Multi-satellite Retrievals for GPM (IMERG) final run and the TRMM Multi-sa...

2005
CHRISTOPHER P. KONRAD DEREK B. BOOTH

—Urban development modifies the production and delivery of runoff to streams and the resulting rate, volume, and timing of streamflow. Given that streamflow demonstrably influences the structure and composition of lotic communities, we have identified four hydrologic changes resulting from urban development that are potentially significant to stream ecosystems: increased frequency of high flows...

2001
Vivek Arora Frank Seglenieks Nick Kouwen Eric Soulis

Scaling aspects of river flow routing are studied by comparing two flow routing schemes, one designed for use in coupled general circulation models (GCMs) and operated at large spatial scales (3⁄4350 km), and the other designed for use in typical hydrological applications at small spatial scales (3⁄425 km). The same runoff data are used as input into the two routing schemes, and comparisons are...

2003
Christine F. Reilly Charles N. Kroll

[1] Estimators of low-streamflow statistics are often required for water quality and quantity management at gauged and ungauged sites. Here the technique of baseflow correlation is investigated as an estimator of the 7-day, 10-year low-streamflow statistic at ungauged sites. This method uses an information transfer technique to estimate streamflow statistics at an ungauged site by correlating a...

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