NON-POINT SOURCE LOADINGS OF NUTRIENTS AND DISSOLVED ORGANIC CARBON FROM AN AGRICULTURAL-SUBURBAN WATERSHED IN EAST CENTRAL FLORIDA
NON-POINT SOURCE LOADINGS OF NUTRIENTS AND DISSOLVED ORGANIC CARBON FROM AN AGRICULTURAL-SUBURBAN WATERSHED IN EAST CENTRAL FLORIDA
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佛罗里达州中东部农业郊区流域的养分和溶解有机碳的非点源负荷
DOI：
10.1016/0043-1354(91)90073-y
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发表时间：
1991
期刊：
影响因子：
12.8
通讯作者：
F. Dierberg
中科院分区：
文献类型：
--
作者：
F. Dierberg
氮，磷和溶解有机碳的单位面积负荷进行了测量，从四个子流域和整个256 km 2集水区支流的印度河泻湖。集水区是一个快速增长的郊区，由佛罗里达中东部322公里的运河排水。在3次大暴雨发生的6周时间内，控水建筑物排水渠水向下游沃茨输出了年总氮的1/3、总磷的1/2和溶解有机碳的1/4。高溶解无机（1.3公斤N/公顷-年）和有机（4.4公斤N/公顷-年）氮的年负荷记录为旋转放牧子流域，在风暴事件期间，整个溶解无机氮负荷离开集水盆地起源于农业子流域。从农业子流域的年度总氮和总磷输出系数偏离很大，从公布的“全国”平均值，但非常相似的“区域”系数公布的威斯康星州。溶解的无机氮和磷有很大的差异，以公布的“区域”系数，强调需要具体地点的研究。
Unit area loadings for nitrogen, phosphorus and dissolved organic carbon were measured from four sub-watersheds and the entire 256 km2catchment area tributary to the Indian River Lagoon. The catchment area is a rapidly growing suburban area drained by 322 km of canals in east central Florida. One-third of the annual total nitrogen, one-half of the total phosphorus and one-fourth of the annual dissolved organic carbon were exported in the drainage canal water at the water control structure to downstream waters during a 6-week period when three major storms occurred. High annual loadings of dissolved inorganic (1.3 kg N/ha-yr) and organic (4.4 kg N/ha-yr) nitrogen were recorded for the rotational grazing sub-watershed; during storm events, the entire dissolved inorganic nitrogen load leaving the catchment basin originated from the agricultural sub-watershed. Annual total nitrogen and total phosphorus export coefficients from the agricultural sub-basin deviated considerably from published “national” averages, but were very similar to “regional” coefficients published for Wisconsin. Dissolved inorganic nitrogen and phosphorus had wide variances to the published “regional” coefficients, emphasizing the need for site-specific studies.