نتایج جستجو برای: no 10

تعداد نتایج: 3985700  

2007
Christopher M. Fleming Averil Cook

Lake McKenzie is one of the most highly used and popular visitor destinations of all Fraser Island’s natural sites, attracting 2,000 visitors a day in peak periods. Many consider this level of visitation to be unsustainable and the management authority is considering a range of management options. In assessing the alternatives it is useful to have some idea of the recreational value of the Lake...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2009
E A Murakami D C Bicudo L Rodrigues

The changes imposed by dams on hydrological regime, water transparence and nutrient concentrations downstream affect biodiversity in relation to species richness and specific composition of the community. The aim of this work was evaluate this effect on periphyton, comparing richness and composition of periphytic algae in the Garças Lake, Upper Paraná River floodplain, between the years 1994, b...

Journal: :Journal of environmental sciences 2008
Jingqiao Mao Qiuwen Chen Yongcan Chen

Taihu Lake, the largest freshwater shallow lake in eastern China, has suffered from severe eutrophication over the past two decades. This research developed a three-dimensional eutrophication model to investigate the eutrophication dynamics. The model fully coupled the biological processes and hydrodynamics, and also took into account the effects of sediment release and the external loads from ...

2002
B. K. LUBSANDORZHIEV

The lake Baikal Neutrino Experiment has history of more than 20 years, starting from small short experiments with a few PMTs in the early 80s to the present large scale longterm operating neutrino telescope NT-200, which has been put into operation on April 6th 1998. The telescope’s effective area for muons is 2000-10000 depending on a muon energy. The rate of events due to atmospheric neutrino...

2006
A. G. Davies

Introduction: We have obtained multiple contemporaneous ground and space-based visible and hyperspectral infrared observations of a persistent active lava lake, one of the rarest volcanonological phenomenon. This unique dataset advances our understanding of remote sensing of lava lake activity on Earth and Io. The Mt. Erebus lava lake: Active lava lakes are the top of an open magma system and p...

2013
Elke S. Reichwaldt Haihong Song Anas Ghadouani

Toxic cyanobacterial blooms can strongly affect freshwater food web structures. However, little is known about how the patchy occurrence of blooms within systems affects the spatial distribution of zooplankton communities. We studied this by analysing zooplankton community structures in comparison with the spatially distinct distribution of a toxic Microcystis bloom in a small, shallow, eutroph...

Journal: :Environmental monitoring and assessment 2008
B Zhang J Li Q Shen D Chen

Total suspended matter is an important water quality parameter, and plays a key role in water quality evaluation, especially of inland waters. Many different methods have been developed to estimate TSM from remote sensing data, in which empirical methods and model-based methods are two types of commonly used methods. Compared with empirical methods, model-based methods have the advantages of de...

Journal: :Bulletin of environmental contamination and toxicology 1999
E D Caldas R Coelho L C Souza S C Silva

Paranoá Lake is a man-made reservoir, created in 1959 with the city of Brasilia, the capital of Brazil. The lake has a surface area of 38 Km 2 and an watershed area of 1046 Km, of which approximately 8% is agricultural. Around 450,000 people live in the catchment area. Contamination of Paranoá Lake and other water systems with organochlorine (OC) insecticides has been reported (Dianese et al., ...

2014
Hua Wang Mengan Wu Yanqing Deng Chunyan Tang Rui Yang

In this paper, we propose a coupled method to optimize the surface water quality monitoring sites for a huge freshwater lake based on field investigations, mathematical analysis, and numerical simulation tests. Poyang Lake, the largest freshwater lake in China, was selected as the research area. Based on the field investigated water quality data in the 5 years from 2008 to 2012, the water quali...

2016
Xiwei He Peng Liu Guolu Zheng Huimei Chen Wei Shi Yibin Cui Hongqiang Ren Xu-Xiang Zhang

This study systematically evaluated five microbial and four mitochondrial DNA (mtDNA) markers, including sensitivities and specificities under PCR method, and fecal concentrations and decay rates in water under qPCR method. The microbial DNA markers were the three human-associated (BacH, HF183 and B.adolescentis) and two pig-associated (Pig-2-Bac and L.amylovorus), while the mtDNA ones were two...

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