As one of the most important causes water quality deterioration, NPS (non-point source) pollution has become an urgent environmental and livelihood issue. To date, there have been only a few studies focusing on conforming to estimation, sources are mainly concentrated in nitrogen phosphorus nutrients. Unlike that consider intensity loads, risk for China’s Fuxian Lake Basin was evaluated this st...

background & aims of the study: in this research, long-term hydrologic impact assessment model is selected for simulation of runoff and nps pollution. the aim of this study is modeling of non-point source pollution by l-thia model in zayandehrood watershed in 2015. materials & methods: in this study, analytical survey and investigation of references in the context of library studies has been us...

The current applications of geographic information systems (GIS) applications to non-point-source pollution modeling for agricultural area are reviewed with respect to the requirements for GIS, the hydrological/water quality modeling processes, and integration between GIS and Non-Point-Source Pollution (NPSP) models. Some necessary considerations for future studies are also discussed by summari...

In the UK, the recycling of sewage sludge to land is expected to double by 2006 but the security of this route is threatened by environmental concerns and health scares. Strategic investment is needed to ensure sustainable and secure sludge recycling outlets. At present, the security of this landbank for sludge recycling is determined by legislation relating to nutrient rather than potentially ...

A model was developed to estimate total suspended solids (TSS) removal in the Stormceptor, an oil/sediment separator. The model was based on a commonly used continuous simulation model (USEPA SWMM) for hydrological processes. The suspended solids’ loading was estimated using build-up and wash-off equations. The solids were assumed to be distributed into five particle sizes for settling calculat...

Surface runoff and sediment transport in ̄uence soil quality and the quality of receiving waters. Simulation models are useful tools to describe drainage behavior and sediment yield to develop management strategies for agricultural waters. The objective of this study was to investigate the performance of the Agricultural Non-Point Source Pollution Model (AGNPS) and modi®ed versions comparing mea...