نتایج جستجو برای: forest watershed

تعداد نتایج: 121015  

Journal: :Microbes and environments 2011
Dustin K Goto Tao Yan

Effects of different land uses on densities of Escherichia coli, enterococci, and Clostridium perfringens in the water and soil of a tropical watershed were investigated. Densities of fecal indicator bacteria (FIBs) in the watershed exhibited a clear land-use dependency in the stream water. Significantly higher concentrations were detected in the urban portion of the stream (417, 420, and 44 CF...

2012
E. Menaka

Deforestation is a serious issue that most nations face today. Deforestation is primarily due to urbanization. Most nations that are presently under the scanner for deforestation had immense forest stretch. The need for settlements and development has triggered such a scenario. The proposed method segment the forest region with city and classify how much deforestation occurs. In this paper imag...

2007
Devendra M. Amatya Artur Radecki-Pawlik D. M. Amatya A. Radecki-Pawlik

Three first-, secondand third-order experimental forested watersheds located within the Francis Marion National Forest in the lower coastal plain of South Carolina were monitored for rainfall and stream outflows. The largest watershed (WS 78) with some open lands, roads and wetlands gave higher annual water yields compared to the two other smaller ones (WS 79, WS 80) with mostly forest vegetati...

2013
Ge Sun Yongqiang Liu

Although it is well known that climate controls the distribution, productivity and functioning of vegetation on earth, our knowledge about the role of forests in regulating regional climate and water resources is lacking. The studies on climate-forests feedbacks have received increasing attention from the climate change and ecohydrology research communities. The goal of this study is to provide...

حجتی, سید محمد, میرزایی زاده, وحید, نیک نژاد, مریم,

In order to map the forest canopy density Bivareh Ilam Landsat 8 satellite data of 22 July 2014 and FCD model was used. The FCD of four indicators of vegetation, soil, shade and the heat index by applying a suitable threshold was and the density of vegetation and forest canopy density map based on FCD in percent respectively. Forest density map obtained, according to the classes provided by the...

2004
WAYNE T. SWANK

There is ever-increasing competition for the many uses and natural resources of forests in the eastern United States. Multiple-use management has long been a stated goal for these forests, but application has been problematic and seldom satisfactory to all users. There is a need to incorporate more science into management decisions for Eastern forests, and thereby convincingly demonstrate to fo...

2011
Yusuf Serengil Wayne T. Swank Mark S. Riedel James M. Vose YUSUF SERENGIL WAYNE T. SWANK MARK S. RIEDEL JAMES M. VOSE

Understanding watershed responses to extreme events is important for assessing potential impacts of floods, droughts, episodic pollution, and other external driving variables on watershed resources. In this study, we combine trend and frequency analyses with paired watershed techniques to evaluate the long-term highand low-flow data from Coweeta Hydrologic Laboratory in North Carolina, USA in a...

2011
D. M. Amatya M. K. Jha

Modeling the hydrology of low‐gradient forested watersheds on shallow, poorly drained soils of the coastal plain is a challenging task due to complexities in watershed delineation, microtopography, evapotranspiration, runoff generation processes and pathways including flooding and submergence caused by tropical storms, and complexity of vegetation species. The main objective of this study was t...

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