黑河流域磷迁移转化过程连续模拟研究

以西安市的主要供水水源黑河流域为例,在Matlab软件辅助下,使用蓄满产流模型、逆高斯分布汇流模型、水沙关系模型以及澳大利亚学者Viney所提出的营养物迁移转化模型对黑河流域1981～1990年磷的迁移转化过程进行了连续模拟,模拟了磷的输出情况,预测了黑河流域磷污染负荷量.结果表明:模拟结果符合磷素流失的一般规律,年径流量大的年份,从流域输出的磷素也较多,反之,则较小;对磷的连续模拟结果与实测插补延长后总磷年负荷量的相对误差基本上在±30%以内,结果较合理,由此表明该法可用于黑河流域磷素迁移转化的连续模拟.同时,本文模型只是流域非点源污染连续模拟的初步尝试,尚需进行进一步检验、改进和完善.

Continuously Modeling Research on the Transfer and Transform Processes of Phosphorus in Heihe River Watershed

Taking supply water source of Xi'an city as an example,by the help of Matlab software,using fill and yield model,the Inverse-Gauss flow concentration model,runoff-sediment relation model and Viney model,the transfer and transform processes of phosphorus from 1981 to 1990 were modeled continuously.Phosphorus pollution loads of Heihe River were also estimated.The result shows that the continuous modeling result accorded with the generic law of phosphorus loss.The relative error between modeling result and monitor interpolation result was not more than ±30%.So the modeling method proposed in this paper could be used to model continuously the transfer and transform processes of phosphorus in Heihe river watershed.This study was only primary attempt to non-point source pollution continous model,therefore,the modeling method needed to be improved and perfected further.