نتایج جستجو برای: hydrological regulation

تعداد نتایج: 567542  

2017
Lu Zhuo Dawei Han

Reliable estimation of hydrological soil moisture state is of critical importance in operational hydrology to improve the flood prediction and hydrological cycle description. Although there have been a number of soil moisture products, they cannot be directly used in hydrological modelling. This paper attempts for the first time to build a soil moisture product directly applicable to hydrology ...

2016
Kaisheng Luo Fulu Tao Juana P. Moiwo Dengpan Xiao

The contributions of climate and land use change (LUCC) to hydrological change in Heihe River Basin (HRB), Northwest China were quantified using detailed climatic, land use and hydrological data, along with the process-based SWAT (Soil and Water Assessment Tool) hydrological model. The results showed that for the 1980s, the changes in the basin hydrological change were due more to LUCC (74.5%) ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده مهندسی علوم آب 1393

drought is transient phenomenon , slow , repetitive and integral part of the climate of each region. drought begins with a substantial reduction in precipitation over the long-term average rainfall and over time, reduced soil moisture and surface and ground water resources will continue to decrease. this phenomenon is the most important in bakhtegan basin because of its importance in strategic ...

2006
Vimal Sharma David Swayne David Lam William Schertzer

Hydrological models have been increasing in complexity over the years. These models rely on their calibration to simulate real world conditions as close as possible. Calibration is a tedious and time-consuming process. An auto-calibration algorithm (SCE-UA) developed by Duan et al. [1992], has been successfully used in hydrological modeling area. This is a serial algorithm and as complexity of ...

2017
Jian Zhou Li-Di Zheng Xu Pan Wei Li Xiao-Ming Kang Jing Li Yu Ning Ming-Xiang Zhang Li-Juan Cui

Hydrological conditions determine the distribution of plant species in wetlands, where conditions such as water depth and hydrological fluctuations are expected to affect the interspecific interactions among emergent wetland species. To test such effects, we conducted a greenhouse experiment with three treatment categories, interspecific interaction (mixed culture or monoculture), water depth (...

2015
P. A. Marker N. Foged X. He A. V. Christiansen J. C. Refsgaard E. Auken P. Bauer-Gottwein

Large-scale hydrological models are important decision support tools in water resources management. The largest source of uncertainty in such models is the hydrostratigraphic model. Geometry and configuration of hydrogeological units are often poorly determined from hydrogeological data alone. Due to sparse sampling in space, lithological borehole logs may overlook structures that are important...

2015
Xiaofan Zeng Na Zhao Huaiwei Sun Lei Ye Jianqing Zhai João Miguel Dias

The comprehensive assessment of climatic and hydrological droughts in terms of their temporal and spatial evolutions is very important for water resources management and social development in the basin scale. To study the spatial and temporal changes of climatic and hydrological droughts and the relationships between them, the SPEI and SDI are adopted to assess the changes and the correlations ...

2012
L. Longuevergne L. Oudin N. Florsch

New inclinometers devoted to hydrological studies were set up in the Vosges Mountains (France). Two orthogonal 100-meter base hydrostatic inclinometers were installed in December 2004 as well as a hydrometeorological monitoring system for the 100-km2 hydrological unit around the inclinometer. As inclinometers are very sensitive to environmental influences, this observatory is a test site to con...

2013
Peter Berg Christopher Moseley Jan O. Haerter

Peter Berg Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe Now at Rossby Centre, Swedish Meteorological and Hydrological Institute, Norrköping, Sweden [email protected] Christopher Moseley Max Planck Institute for Meteorology, Hamburg, Germany and Helmholtz Zentrum Geesthacht, Climate Service Center, Hamburg, Germany [email protected] Jan ...

2006
Daniel Michelson

Over the last few years, the way data and products from the Swedish weather radar network (SWERAD) have been generated and mananged has undergone a significant transformation, from distributed to centralized configuration. New systems have been introduced for these purposes, along with a number of quality enhancements. This contribution attempts to summarize these recent developments, and it al...

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