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Chapter 5 Discharge Losses of Nitrogen and Phosphorus from a Golf Course Watershed

机译：第五章高尔夫球场流域的氮磷流失

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Golf course turf accounts for approximately one million hectares of land in the United States, and is the most intensively managed system in the urban landscape. Discharge from golf course turf may potentially transport nutrients into surface water. The primary objective of this research was to assess the small watershed scale hydrologic and water quality impact from a well maintained golf course. The study site was a sub-area of Northland Country Club located in Duluth, MN. Surface water discharge and nutrient concentrations [NO_3-N, NH_4-N, dissolved reactive phosphorus (DRP), TN, and TP] were collected for a 2.5 year period (June 2002-November 2004). The mean measured rainfall/discharge coefficient during the study period was 0.46. Measured NO_3-N and NH_4-N concentrations at the inflow and outflow sites were not significantly different (p > 0.05), however, concentrations of TN, DRP, and TP at the same locations were significantly different (p < 0.05). Nutrient load attributed to the course was 0.11 kg ha~(-1) yr~(-1) NH_4-N, 0.59 kg ha~(-1) yr~(-1) NO_3-N, 0.14 kg ha~(-1) yr~(-1) DRP, 2.79 kg ha~(-1) yr~(-1) TN, and 0.27 kg ha~(-1) yr~(-1) TP. Nitrogen loads from this site pose minimal environmental concerns; however, phosphorus concentrations are consistent with concentrations known to lead to eutrophic conditions.
机译：高尔夫球场草皮在美国占地约一百万公顷，是城市景观中管理最密集的系统。高尔夫球场草皮排出的水可能会将养分输送到地表水中。这项研究的主要目的是评估一个维护良好的高尔夫球场对小流域水文和水质的影响。研究地点是位于明尼苏达州德卢斯的Northland Country Club的子区域。收集了2.5年（2002年6月至2004年11月）的地表水排放量和养分浓度[NO_3-N，NH_4-N，溶解性反应性磷（DRP），TN和TP]。在研究期间，平均测得的降雨/流量系数为0.46。在流入和流出部位测得的NO_3-N和NH_4-N浓度无显着差异（p> 0.05），但是在相同位置的TN，DRP和TP浓度却有显着差异（p <0.05）。归因于过程的养分负荷为0.11 kg ha〜（-1）yr〜（-1）NH_4-N，0.59 kg ha〜（-1）yr〜（-1）NO_3-N，0.14 kg ha〜（-1 yr〜（-1）DRP，2.79 kg ha〜（-1）yr〜（-1）TN和0.27 kg ha〜（-1）yr〜（-1）TP。来自该地点的氮负荷对环境的影响最小。然而，磷的浓度与已知导致富营养化的浓度一致。

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