搜索结果: 1-15 共查到“水文学 nutrient”相关记录23条 . 查询时间(0.153 秒)
Nutrient and Contaminant Export Dynamics in a Larger-order Midwestern Watershed: Upper White River, Central Indiana, USA
export nitrogen nitrate phosphorus atrazine
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2015/1/16
The transport of excess nutrients, sediment, and other contaminants to surface waters has been shown to cause a number of environmental and human health concerns. An understanding of the export pathwa...
Estimating Limiting Nutrient Loadings in an Interacting Surface and Ground Water Basin
sediment Snake River Basin Idaho
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2015/1/6
Watershed management requires the determination of both point and non-point sources of pollution within a watershed. The primary non-point source pollutants in a typical watershed are nutrients (mainl...
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...
Water and nutrient balances in a large tile-drained agricultural catchment: a distributed modeling study
Water nutrient tile-drained agricultural catchment
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2010/12/22
This paper presents the development and implementation of a distributed model of coupled water nutrient processes, based on the representative elementary watershed (REW) approach, to the Upper Sangamo...
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...
Water and Nutrient Budgeting of Rostherne Mere,Cheshire,UK
Water Nutrient Budgeting Rostherne Mere
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2009/10/22
This paper presents a simple model of the Rostherne Mere water catchment. The
model allows calculation of water and elemental budgets on meteorological data
using regressions derived from a monitori...
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...
Modeling nutrient in-stream processes at the watershed scale using Nutrient Spiralling metrics
biogeochemical models watershed applications fine-scale deterministic models
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2009/7/22
One of the fundamental problems of using large-scale biogeochemical models is the uncertainty involved in aggregating the components of fine-scale deterministic models in watershed applications, and i...
Effect of clear cutting on nutrient fluxes in a subalpine forest at Fraser, Colorado
nutrient fluxes Fraser subalpine forest
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2009/6/8
Nutrient fluxes were investigated on a forested and a clearcut plot in a mixed conifer high elevation (2900 m) forest at the Fraser Experimental Forest in Fraser, Colorado, USA. Plots were located on ...
Uncertainty of solute flux estimation in ungauged small streams：potential implications for input-output nutrient mass balances at stream reach scale
nutrient retention hydrological conditions
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2009/5/18
Input-output mass balances within stream reaches provide in situ estimates of stream nutrient retention/release under a wide spectrum of hydrological conditions. Providing good estimates of the mass b...
Effects of watershed and riparian zone characteristics on nutrient concentrations in the River Scheldt Basin
riparian zone watershed River Scheldt Basin
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2009/5/15
The relative influence of a set of watershed characteristics on surface water nutrient concentrations was examined in 173 watersheds within two subcatchments (Upper-Scheldt and Nete) of the River Sche...
Analysis and simulation of nutrient retention and management for a lowland river-lake system
nutrient retention lowland river-lake system European Water Framework Directive
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2009/5/13
In the context of the European Water Framework Directive, we studied the possible impact of reduced emissions on phosphorus and nitrogen concentrations in a lowland river-lake system (Havel River, Ger...
Participatory scenario development for integrated assessment of nutrient flows in a Catalan river catchment
nutrient flows Catalan river catchment
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2009/5/13
Rivers in developed regions are under significant stress due to nutrient enrichment generated mainly by human activities. Excess nitrogen and phosphorus emissions are the product of complex dynamic s...
Evaluating the risk of non-point source pollution from biosolids：integrated modelling of nutrient losses at field and catchment scales
non-point source pollution biosolids nutrient losses catchment scales
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2009/5/6
A semi-distributed model, INCA, has been developed to determine the fate and distribution of nutrients in terrestrial and aquatic systems. The model simulates nitrogen and phosphorus processes in soil...
Estimating nutrient concentrations from catchment characteristics across the UK
Geographical Information System flow index effective-rainfall
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2009/5/6
Within a Geographical Information System (GIS) framework, the distributions of nitrate and orthophosphate concentrations at monitoring sites across the UK were examined and empirical relationships wit...