نتایج جستجو برای: karst development (k)

تعداد نتایج: 1772307  

Journal: :مدیریت مخاطرات محیطی 0
شکور سلطانی دکتری ژئومورفولوژی، وزارت نیرو ایثار نورایی صفت دانشجوی کارشناسی ارشد آموزش محیط زیست، دانشگاه تهران طاهر ولی پور دانشجوی کارشناسی ارشد هیدروژئومورفولوژی، دانشگاه شهید بهشتی عبدالکریم ویسی دانشجوی دکتری ژئومورفولوژی، دانشگاه تهران احمد عباسیان کارشناس ارشد ژئومورفولوژی، دانشگاه تهران

vulnerability and contamination risk assessment is of great importance in karst aquifer management. because of vastness of karst in zagros, natural conditions and human activity within the region of aquifer, pollution emission has become one of the most important challenges in front of zagros aquifers. the purpose of this study is to assess marab aquifer vulnerability, using riske model and, de...

Karstic zones play an important role in feeding the karstic aquifers؛ therefore, recognizing the factors affecting the karst mutation and its zonation in the field of studies concerned with karst water resources is of great concern. The results of these studies can be applied to quantitative and qualitative management and protection of these resources against the pollutions coming from human ac...

The karst areas refers to individual areas that shaped by the dissolution of bedrock and subsurface drainage grid development and are connected mainly with limestone. The karstic formations outcrop 20 percent of the land surface of the planet is covered that 11 percent of Iran are part of this 20% is included. The ZAGROS region of origin karstic formations in the country that the formation of k...

2008
Kevin Wayne Stafford

v Page Introduction Geologic Setting Hydrologic Setting Hypogenic Speleogenesis Coffee Cave Discussion Conclusions Acknowledgements IV. CASTILE EVAPORITE KARST POTENTIAL MAP OF THE GYPSUM PLAIN, EDDY COUNTY, NEW MEXICO AND CULBERSON COUNTY, TEXAS: A GIS METHODOLOGICAL COMPARISON Abstract Introduction Geologic Setting Field Studies GIS Analyses Discussion Conclusions Acknowledgements V. EPIGENE ...

2012
ROBERT BRINKMANN

With growing populations and ever increasing pressure on resources, the need to live sustainably with our environment has increased in significance. When considering such anthropogenic pressures, karst landscapes are as vulnerable, if not more so, than any other environment. Such vulnerability arises from the rapid transit times of percolating water, the poor filtering ability of carbonate bedr...

2005
Rick Olson Caroline Noble

Karst landscape overview THE 52,830 ACRES OF MAMMOTH CAVE NATIONAL PARK are part of the South-Central Kentucky Karst, which is characterized by subterranean drainage to springs on major rivers. From the southeast to the northwest portion of the landscape (Figure 1), there is a gradient of decreasing maturity in karst development, which corresponds to the regional dip of the bedrock. The major c...

Journal: :Tree physiology 2011
Da-Yong Fan Sheng-Lin Jie Chang-Cheng Liu Xiang-Ying Zhang Xin-Wu Xu Shou-Ren Zhang Zong-Qiang Xie

Karst topography is a special landscape shaped by the dissolution of one or more layers of soluble bedrock, usually carbonate rock such as limestone or dolomite. Due to subterranean drainage, overland flow, extraction of water by plants and evapotranspiration, there may be very limited surface water. The hydraulic architecture that plants use to adapt to karst topography is very interesting, bu...

2006
Yonghong Hao Tian-Chyi J. Yeh Caihong Hu Yanrong Wang Xia Li

Karst regions, occupy approximately 25% of the land surface of the earth. Karst aquifers are often major sources of water supply in these areas. However, karst aquifers are generally considered to be particularly vulnerable to pollution and anthropogenic impacts. Large withdrawals of water in karst areas for municipal, agricultural, and industrial use may competitively affect water supply in su...

2016
Bo Liu Reza Malekian Jinpeng Xu

Karst collapse columns, as a potential water passageway for mine water inrush, are always considered a critical problem for the development of deep mining techniques. This study aims to identify the mixing process of groundwater deriving two different limestone karst-fissure aquifer systems. Based on analysis of mining groundwater hydrogeochemical properties, hydraulic connection between the ka...

Journal: :اکو هیدرولوژی 0
محمد رحمتی کارشناس ارشد مهندسی آبخیزداری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس، نور حمید رضا مرادی دانشیار دانشکدة منابع طبیعی، دانشگاه تربیت مدرس، نور حاجی کریمی دانشیار، دانشکدة کشاورزی، دانشگاه ایلام خلیل جلیلی دانشجوی دکتری مهندسی آبخیزداری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس، نور

abstract one of the importance groundwater resources in kermanshah province is karstic aquifer. this study aimed to investigate the role of development of karstic aquifer in karst springs hydrological properties have been conducted. the studies areas are two karst aquifers include the bistoon-parau and patagh mountain in kermanshah province. in the bistoon-parau region we used of bistoon, berke...

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