نتایج جستجو برای: karst region

تعداد نتایج: 542144  

Journal: :Annals of The Tohoku Geographycal Asocciation 1951

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...

2016
Yuan Yun Hongmei Wang Baiying Man Xing Xiang Jianping Zhou Xuan Qiu Yong Duan Annette S. Engel

Enhanced monsoon duration and soil acidification from acid rain are expected to impact the distribution of microbial communities in surface and subsurface environments, although these impacts are poorly understood for most systems. In central China, soluble carbonate bedrock forms extensive karst landscapes. Current predictions are that the amount of monsoonal precipitation and acid rainfall in...

Journal: :American journal of primatology 2007
Andrew J Marshall Leonardo A Salas Suzette Stephens Linda Engström Erik Meijaard Scott A Stanley

The Indonesian province of East Kalimantan is home to some of the largest remaining contiguous tracts of lowland Dipterocarp forest on the island of Borneo. Nest surveys recently conducted in these forests indicated the presence of a substantial population of Eastern Bornean orangutans (Pongo pygmaeus morio) in the Berau and East Kutai regencies in the northern half of the province. The Sangkul...

Journal: :پژوهش های جغرافیای طبیعی 0
مهران مقصودی دانشیار ژئومورفولوژی، دانشگاه تهران هانیه اخوان دانشجوی کارشناسی ارشد ژئومورفولوژی، دانشگاه تهران مجتبی مهدیان ماهفروزی دانشجوی کارشناسی ارشد اقلیم شناسی، دانشگاه تهران غدیر عشورنژاد دانشجوی دکتری، سنجش از دور و سامانة اطلاعات جغرافیایی دانشگاه تهران

introduction the iran has vast areas of karst landforms due to the relatively high carbonaceous rocks deposited during different geologic eras. karst landforms are noteworthy for investigation from many aspects. the primary importance of these regions is the considerable amount of underground water stored in karst formations. these reserves are favorable, both in quality and quantity, as natura...

2016
Zhenhua Luo Songhua Tang Zhigang Jiang Jing Chen Hongxia Fang Chunwang Li

The karst area of southwest China (KASC) is the largest piece of karst landscape on the earth and a global biodiversity hot-spot with high concentrations of endemic species. Although a number of nature reserves (NRs) have been established across the region, the representativeness of biodiversity of the NR system is still unknown. Based on comprehensive literature and field surveys, and intensiv...

2003
MASON D. BRYANT DOUGLAS N. SWANSTON

Study area.-All the study streams are on the northern quarter of Prince of Wales Island (Figure 1) and traverse a mixture of karst and nonkarst geology. Some streams are fed directly by resurgence from limestone caves, whereas others are fed by overland flow. Hecata Limestone and Bay of Pillars are the major karst formations (Wissmar et al. 1997). Many of the streams flow along contact zones be...

2012
Cyril Fleurant G. E. Tucker H. A. Viles C. Fleurant H. A. VILES

The purpose of this article is to present a model of the formation processes of cockpit karst landscapes. The CHILD software was used to simulate landscape evolution including dissolution processes of carbonate rocks. After examining briefly how the CHILD model operates, two applications of this model involving dissolution of carbonate rocks are presented. The simulated landscapes are compared ...

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