许自舟, 余东, 陶冠峰, 梁斌, 朱容娟, 梁雅惠. 基于网格单元的碧流河流域土壤侵蚀吸附态氮污染负荷研究[J]. 海洋环境科学, 2020, 39(1): 138-144. DOI: 10.12111/j.mes20200120
引用本文: 许自舟, 余东, 陶冠峰, 梁斌, 朱容娟, 梁雅惠. 基于网格单元的碧流河流域土壤侵蚀吸附态氮污染负荷研究[J]. 海洋环境科学, 2020, 39(1): 138-144. DOI: 10.12111/j.mes20200120
XU Zi-zhou, YU Dong, TAO Guan-feng, LIANG Bin, ZHU Rong-juan, LIANG Ya-hui. Estimation of adsorbed nitrogen pollution load by soil erosion in Biliu river basin based on spatial grid unit[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2020, 39(1): 138-144. DOI: 10.12111/j.mes20200120
Citation: XU Zi-zhou, YU Dong, TAO Guan-feng, LIANG Bin, ZHU Rong-juan, LIANG Ya-hui. Estimation of adsorbed nitrogen pollution load by soil erosion in Biliu river basin based on spatial grid unit[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2020, 39(1): 138-144. DOI: 10.12111/j.mes20200120

基于网格单元的碧流河流域土壤侵蚀吸附态氮污染负荷研究

Estimation of adsorbed nitrogen pollution load by soil erosion in Biliu river basin based on spatial grid unit

  • 摘要: 在ENVI、ArcGIS系统的支持下,集成土壤侵蚀模型、泥沙输移模型和污染物富集模型,建立了基于网格单元非点源吸附态氮污染负荷的通用计算方法。以碧流河流域为例,利用调查、收集的数据资料确定了模型中各计算因子,估算了流域土壤流失量、输沙量和吸附态氮负荷。结果表明:2012年,碧流河流域平均土壤侵蚀模数为1137 t/(km2·a),平均输沙模数为295 t/(km2·a),吸附态氮流失模数为326 kg/(km2·a),吸附态氮流失总量为878 t,其中林地562 t、耕地285 t,分别占吸附态氮流失总量的64%和32%。为减小碧流河流域土壤侵蚀吸附态氮的流失,应进一步提高流域内林地、草地质量,在水土保持功能弱的林草地上实施工程措施。

     

    Abstract: Integration of universal soil loss equation with sediment delivery and nitrogen enrichment model supporting by ENVI and ArcGIS system, an universal calculation method of absorbed nitrogen load was established based on spatial grid unit.Illustrated by the example of Biliu river basin, the calculation factors of the models were studied, the amount of soil and sediment loss and the pollution load of absorbed nitrogen was estimated with the sampling data and collection information.The result showed that, the average soil erosion module of Biliu river basin was 1137 tons/(km2·a), the average sediment delivery modulus was 295 tons/(km2·a), the loss of adsorbed nitrogen module was 326 tons/(km2·a) in 2012.The total loss of adsorbed nitrogen was 878 tons, forest and arable land together accounted for 64% and 32%, which forest was 562 tons and arable land was 285 tons respectively.In order to reduce the loss of absorbed nitrogen because of soil erosion in Biliu river basin, one should improve the quality of forest and grassland, and implement protection projects in weak water and soil conversation areas.

     

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