نتایج جستجو برای: buried karst

تعداد نتایج: 15858  

2018
Noam Zach Dvory Alon Ronen Yakov Livshitz Eilon Adar Michael Kuznetsov Alexander Yakirevich

Sustainable groundwater production from karst aquifers is primarily dictated by its recharge rate. Therefore, it is essential to accurately quantify annual groundwater recharge in order to limit overexploitation and to evaluate artificial methods for groundwater enrichment. Infiltration during erratic flood events in karst basins may substantially contribute to aquifer recharge. However, the co...

Journal: :caspian journal of environmental sciences 2008
v. gholami m. azodi e. taghvaye salimi

springs are the important water resources, which thier study is necessary in terms of their management and exploitation. in northern iran, the karst springs locate in the central alborz highlands and alluvial springs on the caspian southern coasts.the karst and alluvial springs discharge is variable because of different conditions in terms of aquifer, topography and precipitation .this study ha...

2005
G. Kovačič

Slovenian karst areas extend over 43% of the country; limestones and dolomites of the Mesozoic era prevail. In Slovenia karst groundwater contributes up to 50% of the total drinking water supply. The quality of water is very high, despite the fact that it is extremely vulnerable to pollution. The present article is a study and a review of the potential and actual sources of pollution to the gro...

2010
Vincent Bailly-Comte Jonathan B. Martin Hervé Jourde Elizabeth J. Screaton Séverin Pistre Abigail Langston

In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: Karst aquifers Hydrograph recession Matrix–conduit exchange Hydrodynamics Causse d'Aumelas Santa Fe River s u m m ...

E. Taghvaye Salimi M. Azodi V. Gholami,

Springs are the important water resources, which thier study is necessary in terms of their management and exploitation. In northern Iran, the karst springs locate in the central Alborz highlands and alluvial springs on the Caspian southern coasts.The Karst and alluvial springs discharge is variable because of different conditions in terms of aquifer, topography and precipitation .This study ha...

2011
B. Wang

Green plants play an important role in matter and energy transformations and are key messengers in the carbon and energy cycle. Vegetation net primary productivity (NPP) reflects the capability of plants to convert solar energy into photosynthate (fixed carbon). It can be used as a direct indicator of current status and future trend of ecological processes affected by human activities and clima...

Journal: :Remote Sensing 2014
Osmar Abílio de Carvalho Renato Fontes Guimarães David R. Montgomery Alan R. Gillespie Roberto Arnaldo Trancoso Gomes Eder de Souza Martins Nilton Correia Silva

Remote sensing has been used in karst studies to identify limestone terrain, describe exokarst features, analyze karst depressions, and detect geological structures important to karst development. The aim of this work is to investigate the use of ASTER-, SRTMand ALOS/PRISM-derived digital elevation models (DEMs) to detect and quantify natural karst depressions along the São Francisco River near...

Journal: :Ambio 2006
Baiping Zhang Fei Xiao Hongzhi Wu Shenguo Mo Shouqian Zhu Lifei Yu Kangning Xiong Anjun Lan

Karst landscapes—regions characterized by sinkholes, caves, springs, underground rivers, and slowly dissolving bedrock— constitute about 25% of the world’s land surface (1). Although some karst landscapes are attractive and of aesthetic value, most of them are recognized as fragile zones unsuitable as human habitats— mainly due to extremely poor soil cover, or a complete lack of soil, and rapid...

2014
Jie Zhao Shengping Li Xunyang He Lu Liu Kelin Wang

Karst ecosystems are fragile and are in many regions degraded by anthropogenic activities. Current management of degraded karst areas focuses on aboveground vegetation succession or recovery and aims at establishing a forest ecosystem. Whether progressive succession of vegetation in karst areas is accompanied by establishment of soil biota is poorly understood. In the present study, soil microb...

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