Source apportionment of nutrient contributions to rivers in England and Wales modelled with SAGIS

Estimates of in-river concentrations (mg/l) and loads (kg/day) of nutrients to rivers in England and Wales from multiple sector sources, modelled with SAGIS (Source Apportionment GIS). The nutrients include nitrate (mg/l N) and ortho-phosphate (mg/l P); the estimate loads are expressed as kilograms per day (kg/day) and the in-river concentrations as milligrams per litre (mg/l). Sources are both diffuse and point. Diffuse sources include livestock farming, arable farming, highways, urban runoff, background (from soils), onsite wastewater treatment systems and atmospheric deposition. Point sources include treated wastewater effluent, combined sewer overflows and storm tanks, industrial discharges and mine water discharges. Concentrations and loads are modelled using the Environment Agency's catchment river model, SIMCAT, at the locations of model features or every 1 km along each river, taking into account all upstream sources and user defined river losses. SAGIS is a modelling framework was developed through the UK Water Industry Research Programme (UKWIR) project 'Chemical Source Apportionment under the WFD' [1], with support from the Environment Agency and SEPA. The model is also described in [2] [1] UKWIR (2012) Chemical Source Apportionment under the WFD (12/WW/02/3). Final report for UK Water Industry Research, 1 Queen Annes Gate, London, ISBN: 1 84057 637 5. [2] Comber, S.D.; Smith, R.; Daldorph, P.; Gardner, M.J.; Constantino, C.; Ellor, B. (2013) Development of a Chemical Source Apportionment Decision Support Framework for Catchment Management. Environ. Sci. Technol. 47, 9824-9832 Full details about this dataset can be found at https://doi.org/10.5285/8c5d9e38-0244-4a39-8600-a85513a6fecf

本数据集收录了英格兰和威尔士河流中多种来源的营养物质（如硝酸盐（mg/l N）和正磷酸盐（mg/l P））在河流中的浓度（mg/l）和负荷（kg/day）的估算值，数据通过SAGIS（源分配地理信息系统）模型进行模拟。估算的负荷以每日千克（kg/day）为单位表达，河流中的浓度为每升毫克（mg/l）。来源包括弥散源和点源。弥散源包括畜牧业、耕地农业、公路、城市径流、背景源（来自土壤）、现场污水处理系统以及大气沉降。点源包括处理后的废水排放、合流污水溢流和暴雨蓄水池、工业排放和矿山废水排放。浓度和负荷的模拟采用环境署的流域河流模型SIMCAT，在模型特征的位置或每条河流沿线的每1公里处进行，同时考虑所有上游来源和用户定义的河流损失。SAGIS模型框架是在英国水工业研究计划（UKWIR）项目“WFD下的化学源分配”中开发的[1]，得到了环境署和SEPA的支持。该模型亦在[2]中有所描述。[1] UKWIR（2012）WFD下的化学源分配（12/WW/02/3）。英国水工业研究最终报告，1 Queen Annes Gate，伦敦，ISBN：1 84057 637 5。[2] Comber, S.D.；Smith, R.；Daldorph, P.；Gardner, M.J.；Constantino, C.；Ellor, B.（2013）流域管理化学源分配决策支持框架的开发。环境科学技术，47，9824-9832。关于本数据集的详细信息可在https://doi.org/10.5285/8c5d9e38-0244-4a39-8600-a85513a6fecf找到。