نتایج جستجو برای: sub basin

تعداد نتایج: 262740  

1999
Prasanna Gowda

(UMRB) is a major sub-basin of the entire Mississippi River, one of the largest and most diverse ecosystems in North America. The length of the Upper Mississippi River (UMR) is approximately 800 miles (1,287 km). The drainage area of the basin is approximately 189,189 square miles (489,980 km2) and contains about 15 percent of the drainage area of the entire Mississippi River Basin. The Basin i...

Journal: :پژوهش های جغرافیای طبیعی 0
سجاد باقری سیدشکری دانشجوی دکتری ژئومورفولوژی دانشکدة جغرافیا، دانشگاه تهران مجتبی یمانی استاد دانشکدۀ جغرافیا، دانشگاه تهران منصور جعفربیگلو دانشیار دانشکدۀ جغرافیا، دانشگاه تهران حاجی کریمی دانشیار دانشکدۀ کشاورزی، دانشگاه ایلام ابراهیم مقیمی استاد دانشکدۀ جغرافیا، دانشگاه تهران

introduction hydrograph of springs represents clearly all physical processes that control ground water flows inside aquifer (kuto et al., 2012: 41). study of the curve can reveal information about structure and function of aquifer, particularly hydrodynamic parameters including permeability and storage (troch et al., 1993: 228). analysis of recession curve has the advantage to calculate paramet...

2015
FAN JINGJING HUANG QIANG CUI SHEN GUO AIJUN

Dramatic changes in hydrological factors in the Weihe River basin are analysed. These changes have exacerbated ecological problems and caused severe water shortages for agriculture, industries and the human population in the region, but their drivers are uncertain. The Mann-Kendall test, accumulated departure analysis, sequential clustering and the sliding t-test methods were used to identify t...

2007
E. J. KLOK A. BADOUX

A glacier submodel was successfully integrated into the distributed hydrological model WaSiM-ETH to simulate the discharge of a heavily glaciated drainage basin. The glacier submodel comprises a distributed temperature index model including solar radiation to simulate the melt rate of glaciated areas. Meltwater and rainfall are transformed into glacier discharge by using a linear reservoir appr...

2014
D. C. Zemp C.-F. Schleussner H. M. J. Barbosa R. J. van der Ent J. F. Donges J. Heinke G. Sampaio A. Rammig

Continental moisture recycling is a crucial process of the South American climate system. In particular, evapotranspiration from the Amazon basin contributes substantially to precipitation regionally as well as over other remote regions such as the La Plata basin. Here we present an indepth analysis of South American moisture recycling mechanisms. In particular, we quantify the importance of ca...

حجه فروش نیا, شیلا, صفاری, امیر, کرم, امیر,

With the development of economy and social services, increased need to reduce risks, control risks and other important measures in order to provide program management and follow-up plans vulnerability, Having the right information and understanding the current situation in the field is essential for  prevention and planning measures, Therefore, research on risk reduction and knowledge of t...

Journal: :Remote Sensing 2013
Vahid Naeimi Patrick Leinenkugel Daniel Sabel Wolfgang Wagner Heiko Apel Claudia Kuenzer

The natural environment and livelihoods in the Lower Mekong Basin (LMB) are significantly affected by the annual hydrological cycle. Monitoring of soil moisture as a key variable in the hydrological cycle is of great interest in a number of Hydrological and agricultural applications. In this study we evaluated the quality and spatiotemporal variability of the soil moisture product retrieved fro...

2004
David W. Marshall Michael J. Sorge

In 1998 and 2000, we sampled small stream fish communities at 67 sites to evaluate the status of nongame fish species in the Greater Rock River Basin. Forty-five sites were located in the Lower Rock River sub-basin and twenty-two sites in the Sugar-Pecatonica River sub-basin. All of the sites were originally sampled as part of the Fish Distribution Study during the 1970’s. Most of the stream si...

Journal: :تحقیقات جغرافیایی 0
معصومه روستائی دانشگاه گلستان مریم آق آتابای دانشگاه گلستان

current research in order to identify neo tectonic activity of the ziyarat basin has been made on the northern slopes of the eastern alborz in south-gorgan and using the index of morpho tectonic and tectonic evidence in the area. in this regard, the 6 morphological parameters were calculated and the results are analyzed. the overall results of these features, as indicators of the relative activ...

2017
Abayineh Amare Belay Simane

Ethiopia is also frequently identified as a country that is highly vulnerable to climate variability and change. The potential adverse effects of climate change on Ethiopia’s agricultural sector are a major concern, particularly given the country’s dependence on agricultural production, which is sensitive to climate change and variability. This problem calls the need to understand agroecology b...

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