搜索结果: 1-15 共查到“水文学 watersheds”相关记录22条 . 查询时间(0.408 秒)
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
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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
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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
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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
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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
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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
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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
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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 ...
Comparison of Areal Snow Storage Sampling Procedures for Rangeland Watersheds
Areal Snow Storage Procedures Rangeland Watersheds
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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
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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
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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
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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...
Response Time of Forested Mountainous Watersheds in Humid Regions
Response Time Forested Mountainous Watersheds Humid Regions
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2009/10/23
This study proposes an analytical method for the estimation of time lag for forested mountainous watersheds. The water flow in a watershed is separated and analyzed in two phases, the land or hillslop...
Estimating Soil Moisture in Small Watersheds,Using a Water Balance Approach
Soil Moisture Small Watersheds Water Balance Approach
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2009/10/22
Soil moisture content was estimated daily by a energy balance and water budget
(EBWB) analysis of two small subwatersheds in the Walnut Gulch Experimental
Watershed near Tombstone, Arizona. One wate...
Nutrient Losses and N & P Balances in Small Agricultural Watersheds in Estonia
Nutrient Losses N & P Balances Small Agricultural Watersheds
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2009/10/22
The paper deals with nutrient runoff monitoring results and calculated nutrient
budgets on catchment level in small agricultural watersheds in Estonia. A special
programme for monitoring of nutrient...
AN INVESTIGATION OF CURVE NUMBER APPLICABILITY TO WATERSHEDS IN EXCESS OF 25000 HECTARES (250 KM2)
WATERSHEDS CURVE NUMBER 25000 HECTARES
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2009/10/19
The objective of this study was to apply a continuous hydrologic model that uses the Curve Number method to a large undeveloped watershed, calibrate the model and obtain parameter values; and, from th...