IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 7 - WATER RESOURCES AND HYDROINFORMATICS : Modeling Inorganic Nitrogen and Phosphorus Wash-off from Soil Surface
Modeling Inorganic Nitrogen and Phosphorus Wash-off from Soil Surface
Author : Qingyao Yu and Soon Keat Tan
Runoff water quality from a watershed depends on many factors, including pollutant sources and characteristics, weather and hydrological conditions, topography and soil properties. Among the many pollutants found in the surface water, nitrogen (N) and phosphorous (P) are two very important parameters in water quality modelling. Their presence, especially in excess, is the main contributing factor to eutrophication. In this study, a model describing the wash-off process of agricultural inorganic nitrogen and phosphorus on the soil surface is presented. Laboratory and field experiments were carried out to investigate nutrients (in terms of nitrogen and phosphorus) leached from soil, and washed off in surface runoff. Chemical degradation due to exposure to the elements and infiltration was also considered. - + Four water quality indices, including NO , NH , TN and TP were investigated. The model was 3 4 calibrated and verified based on the results obtained in the field experiments.
File Size : 343,964 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 19/07/2016
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