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首页> 外文期刊>Journal of the American Water Resources Association >WATER QUALITY IN AGRICULTURAL, URBAN, AND MIXED LAND USE WATERSHEDS
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WATER QUALITY IN AGRICULTURAL, URBAN, AND MIXED LAND USE WATERSHEDS

机译：农业，城市和混合土地利用流域的水质

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摘要

Water quality and nonpoint source (NPS) pollution are important issues in many areas of the world, including the Inner Bluegrass Region of Kentucky where urban development is chang-ing formerly rural watersheds into urban and mixed use watersheds. In watersheds where land use is mixed, the relative contributions of NPS pollution from rural and urban land uses can be difficult to separate. To better understand NPS pollution sources in mixed use watersheds, surface water samples were taken at three sites that varied in land use to examine the effect of land use on water quality. Within the group of three watersheds, one was predominately agriculture (Agricultural), one was predominately urban (Urban), and a third had relatively equal representation of both types of land uses (Mixed). Nitrogen (N), phosphorus (P), total suspended solids (TSS), turbidity, pH, temperature, and streamflow were measured for one year. Comparisons are made among watersheds for concentration and fluxes of water quality parameters. Nitrate and orthophosphate concentrations were found to be significantly higher in the Agricultural watershed. Total suspended solids, turbidity, temperature, and pH, were found to be generally higher in the Urban and Mixed watersheds. No differences were found for streamflow (per unit area), total phosphorus, and ammonium concentrations among watersheds. Fluxes of orthophosphate were greater in the Agricultural watershed that in the Urban watershed while fluxes of TSS were greater in the Mixed watershed when compared to the Agricultural watershed. Fluxes of nitrate, ammonium, and total phosphorus did not vary among watersheds. It is apparent from the data that Agricultural land uses are generally a greater source of nutrients than the Urban land uses while Urban land uses are generally a greater source Of suspended sediment.
机译：水质和非点源（NPS）污染在世界许多地区都是重要问题，包括肯塔基州的蓝草地区，该地区的城市发展正在将原先的农村集水区变成城市集水区和混合用途集水区。在土地用途混合的流域中，很难区分来自农村和城市土地用途的NPS污染的相对贡献。为了更好地了解混合用途流域中的NPS污染源，在三个土地使用情况不同的地点采集了地表水样本，以检查土地使用对水质的影响。在三个集水区中，一个集水区主要是农业区（农业区），一个集水区主要是城市区（城市区），第三个集水区在两种类型的土地利用中具有相对相等的代表（混合区）。测量一年中的氮（N），磷（P），总悬浮固体（TSS），浊度，pH，温度和水流。在流域之间对水质参数的浓度和通量进行了比较。在农业流域中，硝酸盐和正磷酸盐的浓度明显更高。在城市和混合流域中，总悬浮固体，浊度，温度和pH值通常较高。流域之间的流量（每单位面积），总磷和铵浓度没有差异。与农业流域相比，农业流域中正磷酸盐通量比城市流域中大，而TSS通量在混合流域中更大。流域中硝酸盐，铵和总磷的通量没有变化。从数据中可以明显看出，农业用地通常比城市用地更多地吸收营养，而城市用地通常是更大的悬浮沉积物。

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