نتایج جستجو برای: rivers and other natural resources

تعداد نتایج: 16930682  

2005
Shaowen Zhang Wensheng Wang Jing Ding Jie Liao Xing Wan

Based on the observed data which were collected from 177 gauging stations, the stochastic properties of sequential variations of natural runoff of main rivers in China has been probed with the theory of stochastic process and technology of time series analysis. The theory and technology can demonstrate many kinds of characteristics of the annul runoff time series; the trend, periodicity, serial...

Journal: :global journal of environmental science and management 2015
p. sutthichaimethee w. tanoamchard p. sawangwong p pachana n. witit-anun

this research aims to apply a model to the study and analysis of environmental and natural resource costs created in supply chains of goods and services produced in thailand, and propose indicators for environmental problem management, caused by goods and services production, based on concepts of sustainable production and consumer behavior. the research showed that the highest environmental co...

2010
Sarah E. Null Joshua H. Viers Jeffrey F. Mount

This study focuses on the differential hydrologic response of individual watersheds to climate warming within the Sierra Nevada mountain region of California. We describe climate warming models for 15 west-slope Sierra Nevada watersheds in California under unimpaired conditions using WEAP21, a weekly one-dimensional rainfall-runoff model. Incremental climate warming alternatives increase air te...

Journal: :Ecological applications : a publication of the Ecological Society of America 2006
Angela H Arthington Stuart E Bunn N LeRoy Poff Robert J Naiman

Accounting for natural differences in flow variability among rivers, and understanding the importance of this for the protection of freshwater biodiversity and maintenance of goods and services that rivers provide, is a great challenge for water managers and scientists. Nevertheless, despite considerable progress in understanding how flow variability sustains river ecosystems, there is a growin...

Journal: :Environmental management 2011
John W Ferguson Michael Healey Patrick Dugan Chris Barlow

We compared the effects of water resource development on migratory fish in two North American rivers using a descriptive approach based on four high-level indicators: (1) trends in abundance of Pacific salmon, (2) reliance on artificial production to maintain fisheries, (3) proportion of adult salmon that are wild- versus hatchery-origin, and (4) number of salmon populations needing federal pro...

Journal: :The Science of the total environment 2015
Rolf Altenburger Selim Ait-Aissa Philipp Antczak Thomas Backhaus Damià Barceló Thomas-Benjamin Seiler Francois Brion Wibke Busch Kevin Chipman Miren López de Alda Gisela de Aragão Umbuzeiro Beate I Escher Francesco Falciani Michael Faust Andreas Focks Klara Hilscherova Juliane Hollender Henner Hollert Felix Jäger Annika Jahnke Andreas Kortenkamp Martin Krauss Gregory F Lemkine John Munthe Steffen Neumann Emma L Schymanski Mark Scrimshaw Helmut Segner Jaroslav Slobodnik Foppe Smedes Subramaniam Kughathas Ivana Teodorovic Andrew J Tindall Knut Erik Tollefsen Karl-Heinz Walz Tim D Williams Paul J Van den Brink Jos van Gils Branislav Vrana Xiaowei Zhang Werner Brack

Environmental quality monitoring of water resources is challenged with providing the basis for safeguarding the environment against adverse biological effects of anthropogenic chemical contamination from diffuse and point sources. While current regulatory efforts focus on monitoring and assessing a few legacy chemicals, many more anthropogenic chemicals can be detected simultaneously in our aqu...

Journal: :Environmental science & technology 2006
Christopher J Gurr Martin Reinhard

W ater scarcity has become a harsh reality in many parts of the world. In the past, water needs were often met by building large dams and importing water over long distances. This approach is proving increasingly infeasible because social and environmental costs are too high (1). As the increased need for dependable water resources mirrors the growth in population, many communities are turning ...

2011
V. I. Babkin

Contents 1. Introduction 2. Primary stage of the occurrence of river systems 3. Development of rivers in the Paleozoic 4. Change of hydrography in the Mesozoic 5. Modification of river systems in the Cenozoic 6. Water balance change of the river basins in the Mesozoic-Cenozoic 7. Features of dynamics of the hydrographic network and channel deformations 8. Hydrography and water resources of the ...

2013
Tigris Rivers Hojjat Mianabadi Erik Mostert Mahdi Zarghami Nick van de Giesen

(a) Department of Water Resources, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, The Netherlands h. mianabadi @ tudelft.nl (b) Department of Water Resources, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, The Netherlands e.mostert @ tudelft.nl (c) Faculty of Civil Engineering...

2015
Charles E. Tilburg Linda M. Jordan Amy E. Carlson Stephan I. Zeeman Philip O. Yund

Faecal pollution in stormwater, wastewater and direct run-off can carry zoonotic pathogens to streams, rivers and the ocean, reduce water quality, and affect both recreational and commercial fishing areas of the coastal ocean. Typically, the closure of beaches and commercial fishing areas is governed by the testing for the presence of faecal bacteria, which requires an 18-24 h period for sample...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید

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