نتایج جستجو برای: rainfall simulation

تعداد نتایج: 587817  

ژورنال: آبخیزداری ایران 2019

For suitable programming and management of water resources, access to perfect information from the discharge at the watershed outlet is essential. In most watersheds, the hydrometric station is not available; then, different models are used to simulate the discharge within watersheds without data. The selection of preferred model for rainfall- runoff simulation depends to the purpose of modelin...

2015
Liangang Xiao Yaxian Hu Philip Greenwood Nikolaus J. Kuhn Saskia Keesstra

The use of sediment settling velocity based on mineral grain size distribution in erosion models ignores the effects of aggregation on settling velocity. The alternative approach, wet-sieved aggregate size distribution, on the other hand, cannot represent all destructive processes that eroded soils may experience under impacting raindrops. Therefore, without considering raindrop impact, both me...

ژورنال: علوم آب و خاک 2017
فرومدی, مجید, واعظی, علی رضا,

Rill erosion is the first step in soil erosion process in the hillslopes, particularly in arid and semiarid regions. This study was conducted to investigate the role of rainfall intensity and raindrop impact on the physical properties of soils and particle detachment capacity (Dc) in a marl soil. Marl soil samples were filled into the flumes with 4 m long and 0.9 m wide and exposed to simulated...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2014
E van Dijk J van der Meulen J Kluck J H M Straatman

Short peak rainfall intensities cause sewer systems to overflow leading to flooding of streets and houses. Due to climate change and densification of urban areas, this is expected to occur more often in the future. Hence, next to their minor (i.e. sewer) system, municipalities have to analyse their major (i.e. surface) system in order to anticipate urban flooding during extreme rainfall. Urban ...

In order to measure precipitation as the main variable for estimating the runoff and designing hydraulic structures, the satellite algorithm products that have the proper spatial and temporal coverage, can be used. In this study, at first, the daily streamflow simulation of Sarough-Cahy River from the Zarinehroud basin was conducted through the artificial neural network (ANN) and ground data of...

2006
Andrew W. Robertson Amor V. M. Ines James W. Hansen

A non-homogeneous hidden Markov model (NHMM) is used to make stochastic simulations of March–August daily rainfall at 10 stations over the southeastern United States, 1923–98. Station-average observed daily rainfall is prescribed as an input to the NHMM, which is then used to disaggregate the rainfall in space. These rainfall simulations are then used as inputs to a CERES crop model for maize. ...

2014
Nana Zhao Fuliang Yu Chuanzhe Li Hao Wang Jia Liu Wenbin Mu

The characteristics of rainfall-runoff are important aspects of hydrological processes. In this study, rainfall-runoff processes and soil moisture dynamics at different soil depths and slope positions of grassland with two different row spacings (5 cm and 10 cm, respectively, referred to as R5 and R10) were analyzed, by means of a solution of rainfall simulation experiments. Bare land was also ...

2014
Andrew J. Dowdy Graham A. Mills Bertrand Timbal Morwenna Griffiths Yang Wang

Heavy rainfall events along Australia’s eastern seaboard are often associated with the occurrence of extratropical cyclones known as East Coast Lows. Such rainfall events contribute significantly to runoff and water availability, with consequences that can be beneficial (increased water storage), but also can cause major adverse effects due to both flash floods and widespread inundation. Any tr...

2005
A. Sharma

High-resolution rainfall data sequences serve as inputs for a range of applications in planning, design and management of small (mostly urban) water resources systems. These applications include continuous flow simulation, rain water tank design, and the evaluation of alternate policies for assessment of environmental impacts. However, high-resolution rainfall data are often not available, sinc...

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