نتایج جستجو برای: runoff yield

تعداد نتایج: 207970  

Journal: :International Journal of Current Microbiology and Applied Sciences 2018

ژورنال: آبخیزداری ایران 2020

Surface gravel cover is an important factor for contoroling of soil erosion in dry area specially in area that plant can not grow because of excessive dryness and salinity. The objective of this study was investigation effect of different surface gravel cover on runoff and sediment yeild. For this porpose, 36 field plots with 20 meter length and 0.5 meter width at 3 percent slope were construct...

The proper use of natural resources can preserve these valuable assets. In line with the management of natural resources, land use optimization can be highly useful. The aim of the present study is to propose an appropriate integrative model for optimized allocation of lands for surface runoff and sediment load minimization and net income maximization in Bayg watershed, Iran. In this study, fiv...

ژورنال: علوم آب و خاک 2010
بشری سه‌قلعه, مهدی , رنگ آور, عبدالصالح , صادقی, سیدحمید رضا,

Erosion plots are basically used for studying erosion processes and many related problems. However, the possibility to extend the results of experimental plots to surrounding watersheds is rarely taken into account. In the present study, an attempt was made to study on the accuracy of soil erosion plots in estimation of runoff and sediment yield from small watersheds. Towards this attempt, 12 ...

2014
Zhifeng Li Lixin Wu Wei Zhu Miaole Hou Yizhou Yang Jianchun Zheng

Urban storm inundation, which frequently has dramatic impacts on city safety and social life, is an emergent and difficult issue. Due to the complexity of urban surfaces and the variety of spatial modeling elements, the lack of detailed hydrological data and accurate urban surface models compromise the study and implementation of urban storm inundation simulations. This paper introduces a Const...

2010
JOHANNES DEELSTRA MARIANNE BECHMANN Johannes Deelstra Marianne Bechmann

A one-dimensional model, SOIL/SOILN_NO is used to simulate the water and N balance at the catchment scale. The catchment is characterized by a large number of farm fields with a high degree of variability, both in crop type, fertilizer application, yield level and soil type. The model was not applied to individual fields but instead a lumped approach was chosen in which the number of crops was ...

Journal: :مرتع و آبخیزداری 0
اکرم عارفی اصل کارشناس ارشد آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان علی نجفی نژاد استادیار گروه مرتع و آبخیزداری دانشگاه علوم کشاورزی و منابع طبیعی گرگان فرشاد کیانی استادیار گروه خاک شناسی دانشگاه علوم کشاورزی و منابع طبیعی گرگان عبدالرسول سلمان ماهینی دانشیار گروه محیط زیست دانشگاه علوم کشاورزی و منابع طبیعی گرگان

runoff and sediment measurement is difficult in mountain watershed because of many different problems such as time and financial limitations. so using simulation model is necessary in this regard. accuracy and precision evaluation of models for different watershed of iran is necessary. the aim of this study was the evaluation of swat model efficiency in simulation of runoff and sediment yield i...

2012
Craig A. Grove Jens Zinke Tim Scheufen Joseph Maina Eric Epping Wim Boer Geert-Jan A. Brummer

Coral cores provide vital climate reconstructions for site-specifi c temporal variability in river fl ow and sediment load. Yet, their ability to record spatial differences across multiple catchments is relatively unknown. Here, we investigate spatial linkages between four coral proxies of terrestrial runoff and their relationships between sites. Coral cores were drilled in and around Antongil ...

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