نتایج جستجو برای: permanent river
تعداد نتایج: 145326 فیلتر نتایج به سال:
Whitewater boaters often choose a river based on their preferences for attributes important for their trip experience. This study explored whether preferences and tradeoffs of whitewater boaters for social, resource, and managerial attributes of riverscapes differ among a high and a low use river in the United States by employing a stated choice approach. River trip scenarios were displayed usi...
Rivers can absorb certain amounts of contamination relying on different factors such as: river discharge, the primary conditions of the river, the river depth, discharge and the river viscosity of the offloaded wastes in the river. From parameters of water quality point of view, it is recom-mended to determine some parts of the river which are lower than the standard level in order to find out ...
Clostridium perfringens (CP) and sulphite reducing clostridia (SRC) densities in the Selangor River, Bernam River and Tengi River Canal were examined between April 2007 and January 2008. Water samples were taken from two or three locations along each river, using either depth-integration or grab sampling methods. The downstream sampling site of the Selangor River, Rantau Panjang, reported the h...
Landslides are frequent in the Nanpeng River fault zone southwest Yunnan. Based on a Zhen Qing Expressway survey, geological conditions and characteristics of landslides this area were studied. The conclusions as follows: 1) background was internal cause local highly steep slopes broken rock masses. main landslide types study fault-type accumulation landslides. 2) formation is related to endoge...
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