搜索结果: 1-15 共查到“理学 watersheds”相关记录30条 . 查询时间(0.069 秒)
The Millennium Drought (southeastern Australia) provided a natural experiment to challenge the assumption that watershed streamflow always recovers from drought.
Major Storm Events Play Key Role In Biogeochemistry of Watersheds
Major Storm Biogeochemistry Watersheds
2016/2/22
A new Yale-led study offers a new conceptual framework for understanding the biogeochemistry of watersheds. The framework combines hydrologic and biogeochemical theory to test well established concept...
UW Researchers Advance Understanding of Mountain Watersheds
UW Researchers Mountain Watersheds
2015/11/12
University of Wyoming geoscientists have discovered that the underground water-holding capacity of mountain watersheds may be controlled by stresses in the earth’s crust. The results, which may have i...
An interface of drainage division for modeling wetlands and riparian buffers in agricultural watersheds
Drainage division DEM Geographic Information System GIS wetlands riparian buffers concentrated flow
2015/8/13
In a complex watershed, isolated wetlands, riparian wetlands and riparian buffers provide important functions such as flood attenuation and water quality improvement. For conservation purposes, it is ...
Effects of agricultural conservation practices on oxbow lake watersheds in the Mississippi River alluvial plain
limnology management systems evaluation area nutrients pesticides sediment water quality
2015/3/9
Agricultural lands are considered to be a major source of nonpoint source pollutants such as sediment, pesticides and nutrients in the United States. Conservation practices have been tested for their ...
Remote sensing & GIS applications for drainage detection and modeling in agricultural watersheds
Remote Sensing GIS
2015/1/16
The primary objective of this research involves mapping out and validating the existence of sub surface drainage tiles in a given cropland using Remote Sensing and GIS methodologies. The process is de...
An interface of drainage division for modeling wetlands and riparian buffers in agricultural watersheds
Drainage division DEM Geographic Information System
2015/1/7
In a complex watershed, isolated wetlands, riparian wetlands and riparian buffers provide important functions such as flood attenuation and water quality improvement. For conservation purposes, it is ...
A COMPREHENSIVE GIS-BASED MODELING APPROACH FOR PREDICTING NUTRIENT LOADS IN WATERSHEDS
GIS watershed modeling TMDL nonpoint source pollution
2014/11/12
A comprehensive, GIS-based modeling approach was developed to enable accurate
prediction of nutrient loads in watersheds throughout the state of Pennsylvania; particularly those
watersheds for which...
Hydrological characterization of watersheds in the Blue Nile Basin, Ethiopia
Hydrological characterization watersheds the Blue Nile Basin
2011/1/7
Thirty-two watersheds (31–4350 km2), in the Blue Nile Basin, Ethiopia, were hydrologically characterized with data from a study of water and land resources by the US Department of Interior, Bureau of ...
Topographic effects on solar radiation distribution in mountainous watersheds and their influence on reference evapotranspiration estimates at watershed scale
solar radiation distribution mountainous watersheds
2010/12/22
Distributed energy and water balance models require time-series surfaces of the climatological variables involved in hydrological processes. Among them, solar radiation constitutes a key variable to ...
Lakes as sentinels and integrators for the effects of climate change on watersheds, airsheds, and landscapes
Lakes as sentinels integrators climate change watersheds airsheds landscapes
2014/4/17
Lakes provide unique sentinels and integrators of events in their catchments and airsheds and in the total landscapes in which they are embedded. A variety of physical, chemical, and biological proper...
Comparison of Areal Snow Storage Sampling Procedures for Rangeland Watersheds
Areal Snow Storage Procedures Rangeland Watersheds
2009/10/28
The accuracy of photogrammetry in determining snow depth in mountainous
rangeland watersheds was evaluated on a 0.41-km2 subbasin of the Reynolds
Creek Experimental Watershed, located in the Owyhee ...
Diverging Overland Flow 2.Application to Natural Watersheds
Diverging Overland Flow Application Natural Watersheds
2009/10/28
The diverging overland flow model is utilized to predict surface runoff from
several natural watersheds. The Lax - Wendroff scheme is used to obtain
numerical solutions. This scheme is explicit, sin...
The Effect on Storm Runoff Response of Seasonal Variations in Contributing Zones in Small Watersheds
Storm Runoff Response Seasonal Variations Contributing Zones
2009/10/28
Storm runoff production by saturation overland flow has been studied in two
small watersheds in south-central Ontario. One is in rural land use and contains
a wetland. The total saturated zone is at...
Nutrient Exports from Two Agriculture-Dominated Watersheds in Southern Sweden
Nutrient Exports Two Agriculture-Dominated Watersheds Southern Sweden
2009/10/23
Nutrient concentrations and exports were monitored for eight years in two agriculture-
dominated watersheds in the central part of the Vastgota Plain in Sweden.
The hydrology and the nutrient concen...