نتایج جستجو برای: watershed basin

تعداد نتایج: 71397  

Journal: :Environmental science & technology 2013
Carolyn Kousky Sheila M Olmstead Margaret A Walls Molly Macauley

Green infrastructure approaches have attracted increased attention from local governments as a way to lower flood risk and provide an array of other environmental services. The peer-reviewed literature, however, offers few estimates of the economic impacts of such approaches at the watershed scale. We estimate the avoided flood damages and the costs of preventing development of floodplain parce...

2002
D G Neary

River basin management is becoming increasingly complex in the United States since watershed managers are required to take into consideration the threatened and endangered (T&E) species that inhabit aquatic and riparian ecosystems. Unfortunately, too many fallacies and political agendas have crept into the picture. Suppositions and hypotheses fly everywhere in the political-legal environment un...

2010
Erin Brooks

The water erosion prediction project (WEPP) model is a physically-based hydrology and erosion model. In recent years, the hydrology prediction within the model has been improved for forest watershed modeling by incorporating shallow lateral flow into watershed runoff prediction. This has greatly improved WEPP’s hydrologic performance on small watersheds with seasonal flows, but the current vers...

2017
Nathalia Kaluana Rodrigues da Costa Roney Emanuel Costa de Paiva Márcio Joaquim da Silva Telton Pedro Anselmo Ramos Sergio Maia Queiroz Lima

Ichthyological studies in coastal basins of the Mid-Northeastern Caatinga ecoregion were first conducted in the early 20th century, including collections from the Ceará-Mirim River basin, in northeastern Brazil. Besides a few systematics and ecological studies, the knowledge on fishes from this watershed is still considered partial and restricted to the freshwater portion. Thus, the objective o...

2015
W. S. Zhang D. P. Swaney X. Y. Li B. Hong R. W. Howarth S. H. Ding

This study provides a new approach to estimate both anthropogenic non-point-source and point-source nitrogen (N) inputs to the landscape, and determines their impacts on riverine ammonia–nitrogen (AN) flux, providing a foundation for further exploration of anthropogenic effects on N pollution. Our study site is Huai River basin of China, a watershed with one of the highest levels of N input in ...

2016
Xiaolei Wang Lin Sun Yiqing Zhang Yi Luo Jun Xu

Due to the scarcity of field observations and geodetic measurements in catchments in the Karakoram Mountains in Western China, obtaining precipitation data for the high mountains involves large uncertainties and difficulties. In this study, we used a functional relationship between the annual glacier accumulation and summer temperature at the equilibrium line altitude (ELA) to derive precipitat...

2005
L. R. Welp J. T. Randerson J. C. Finlay S. P. Davydov G. M. Zimova A. I. Davydova S. A. Zimov

[1] Intensification of the Arctic hydrologic cycle and permafrost melt is expected as concentrations of atmospheric greenhouse gases increase. Quantifying hydrologic cycle change is difficult in remote northern regions; however, monitoring the stable isotopic composition of water runoff from Arctic rivers provides a means to investigate integrated basin-scale changes. We measured river water an...

Journal: :Journal of environmental quality 2015
R N Lerch C Baffaut E J Sadler R J Kremer

Goodwater Creek Experimental Watershed (GCEW) has been the focus area of a long-term effort to document the extent of and to understand the factors controlling herbicide transport. We document the datasets generated in the 20-yr-long research effort to study the transport of herbicides to surface and groundwater in the GCEW. This long-term effort was augmented with a spatially broad effort with...

2003

A Tale of a Lake More than 15,000 years ago, glaciers advancing from the northeast gouged a basin of more than 200 km near what is now Madison, Wisconsin, USA. The ice was more than 300 m thick. A considerable amount of water flowed over the land as the glaciers melted, about 12,000 years ago. This water filled much of the basin, which became the watershed of what is now the Madison Lakes (Fig....

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2001
D W Meals

Achievement of management goals for Lake Champlain (Vermont/New York, USA and Quebec, Canada) will require reduction of agricultural phosphorus loads, the dominant nonpoint source in the Basin. Cost-effective phosphorus reduction strategies need reliable treatment techniques beyond basic cropland and waste management practices. The Lake Champlain Basin Agricultural Watersheds National Monitorin...

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