海南岛典型农业土壤产流和面源污染特征分析,此文是一篇面源污染论文范文,为你的毕业论文写作提供有价值的参考。
面源污染论文参考文献：
摘 要 采用径流场结合人工模拟降雨方式,研究各种降雨条件下海南岛不同土地类型产流产沙的规律和面源污染特征.结果表明：土壤（泥沙）产流系数和平均流失速率表现为暴雨>大雨>中雨,且暴雨时的泥沙平均流失速率为中雨时的416%、大雨时的261%,在中雨、大雨和暴雨强度下,平均径流系数分别为24.49%、33.97%和53.40%;雨强对土壤营养物质流失速率的影响达到显著水平,COD、有机质和氮素以径流流失为主,磷素以泥沙流失为主;土壤径流和泥沙中的COD、有机质、氮素和磷素流失速率随雨强的增大而增大,坡度也可明显影响面源污染物的流失;海南岛农业土壤平均流失量为3.79 t/（hm2·a）,中雨强度条件时为1.92 t/（hm2·a）,大雨强度条件时为2.57 t/（hm2·a）,暴雨强度条件时为6.87 t/（hm2·a）.海南岛农业土壤的水土流失强度较高,海南农业土壤的水土流失和农田污染物输出状况不容乐观.
关键词 径流场;模拟降雨;农业面源污染;海南岛;流失速率
中图分类号 P333.5 文献标识码 A
Runoff Characteristics of Agricultural Non-point Source
Pollutants in Typical Soils in Hainan Island
GE Chengjun1,2, TANG Wenhao1,3 *, CHEN Miao4, TANG Tianle2, FENG Dan2, YU Huamei1
1 Key Laboratory of Protection and Development Utilization of Tropical Crop Germplasm Resources（Hainan University）, Ministry
of Education, Haikou, Hainan 570228, China
2 Department of Environmental Science, Hainan University, Haikou, Hainan 570228, China
3 Key laboratory of environmental toxicity（City of Haikou）, Haikou, Hainan 570228, China
4 Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
Abstract In the present paper, a method that runoff field combined with artificially simulated rainfall was used to study the laws of runoff and sediment yield and the characteristics of nutrient losses under various rainfall conditions in the different land types of Hainan Island. Results showed that the soil（sand）runoff index and erosion rate were rainstorm >heavy rain>moderate rain. Under rainfall intensity of rainstorm, heavy rain and moderate rain, the average runoff index was 53.40%, 33.97% and 24.49%. The erosion rate by rainstorm was 261% of heavy rain and 416% of moderate rain, respectively. The effects of rainfall intensity on soil nutrients loss rate reached a significant level. The losses of COD, organic matter and nitrogen were mainly from runoff erosion, while phosphorus loss was mainly from sediment erosion. The loss rates of COD, organic matter, nitrogen and phosphorus in soil runoff and sediment increased with the increase of rainfall intensity. Meanwhile, the non-point source erosion in Hainan was greatly influenced by slope, soil texture and rainfall intensity. The average amount of soil erosion in Hainan island was 3.79 t/（hm2·a）. Under rainfall intensity of moderate rain, heavy rain and rainstorm, the amount of soil erosion was 1.92, 2.57 and 6.87 t/（hm2·a）, The strong agricultural soil erosion characteristics indicated the unoptimistic situation of soil, water conservation and farmland pollutants output.
结论：关于对不知道怎么写面源污染论文范文课题研究的大学硕士、相关本科毕业论文面源污染和点源污染论文开题报告范文和文献综述及职称论文的作为参考文献资料下载。
农业面源污染成因和治理措施
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农业面源污染防治政策体系评估
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中国农业面源污染局部有好转总体不乐观
农业部副部长张桃林4月14日表示，当前我国农业面源污染状况局部有所好转，但一些地方问题比较突出，且有加剧趋势。张桃林在国务院新闻办公室14日举。
赣州农业面源污染现状分析
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