نتایج جستجو برای: river change

تعداد نتایج: 668013  

Journal: :علوم آب و خاک 0
ندا کاوه n. kaveh عطاالله ابراهیمی a. ebrahimi

riparian vegetation is a component of river system that performs certain basic functions including primary vegetative production, protecting stream banks from erosion, trapping sediments, promoting water quality, wildlife habitat and fisheris, forage for livestock, etc. in this research, spatio-temporal change of vegetation riparian area of aghbolagh-river as an upstream of karoon-river for 65-...

Journal: :Movement ecology 2014
Mael Le Corre Christian Dussault Steeve D Côté

BACKGROUND Migratory species face numerous threats related to human encroachment and climate change. Several migratory populations are declining and individuals are losing their migratory behaviour. To understand how habitat loss or changes in the phenology of natural processes affect migrations, it is crucial to clearly identify the timing and the patterns of migration. We propose an objective...

ژورنال: علوم آب و خاک 2013
عطاالله ابراهیمی, , ندا کاوه, ,

Riparian vegetation is a component of river system that performs certain basic functions including primary vegetative production, protecting stream banks from erosion, trapping sediments, promoting water quality, wildlife habitat and fisheris, forage for livestock, etc. In this research, spatio-temporal change of vegetation riparian area of Aghbolagh-river as an upstream of Karoon-river for 65-...

2011
Xiaoying Shi Jiafu Mao Peter E. Thornton Forrest M. Hoffman Wilfred M. Post

[1] We investigated how climate, rising atmospheric CO2 concentration, increasing anthropogenic nitrogen deposition and land use change influenced continental river flow over the period 1948–2004 using the Community Land Model version 4 (CLM4) with coupled river transfer model (RTM), a global river routing scheme. The model results indicate that the global mean river flow shows significant decr...

2009
L. Allan James

Growing concerns over global environmental change, water resources, river restoration, and sustainable river management are focusing attention on the human dimension of fl uvial systems. This GSA Special Paper presents a set of studies and interpretations of river-channel change that refl ect modern viewpoints of river management in the twenty-fi rst century. It seeks to bridge a rich body of l...

2016
Lulu Liu Wei Cao Quanqin Shao Lin Huang Tian He

Based on land use and land cover (LULC) datasets in the late 1970s, the early 1990s, 2004 and 2012, we analyzed characteristics of LULC change in the headwaters of the Yangtze River and Yellow River over the past 30 years contrastively, using the transition matrix and LULC change index. The results showed that, in 2012, the LULC in the headwaters of the Yellow River were different compared to t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...

Journal: :desert 2014
elahe goodarzi alireza massah bavani mohammadtaghi dastorani ali talebi

this study aims to evaluate effects of two downscaling methods; change-factor and statistical downscaling on therunoff of the azam-harat river located at yazd province (with an arid climate) of iran, under the a2 emission scenariofor the period of 2010-2039. for this purpose, cgcm3-ar4 model; a rainfall-runoff conceptual model, ihacres; twodownscaling models, change factor and lars-wg were appl...

2016
Hiroshi P. Sato Hiroshi Une

Previous studies reported that the 2015 Gorkha earthquake (Mw 7.8), which occurred in Nepal, triggered landslides in mountainous areas. In Kathmandu, earthquake-induced land subsidence was identified by interpreting local phase changes in interferograms produced from Advanced Land Observing Satellite-2/Phased Array type L-band Synthetic Aperture Radar-2 data. However, the associated ground defo...

, ,

The Rivers and the Canals are a completely dynamic system and their morphological patterns has been changed continuously over the time, which sometimes lead to erosion and damage to coastal facilities and border displacement. Therefore, its hydrologic behavior should always be considered. Iran has several border rivers with its neighbors that its necessary be studied of wise “the bed change app...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید