McPherson T N, Burian S J, Turin H J, Stenstrom M K, Suffet I H
Los Alamos National Laboratory, New Mexico 87545, USA.
Water Sci Technol. 2002;45(9):255-61.
This research compares the relative contributions of potential contaminants discharged in dry weather flow (DWF) and wet weather flow (WWF) from the highly urbanized Ballona Creek watershed (BCW) in southern California using empirical and deterministic models. These models were used to compare the loading of the following pollutants: total suspended solids, biochemical oxygen demand, total nitrogen, total inorganic nitrogen, total Kjeldahl nitrogen, total phosphorus, copper, lead, arsenic, nickel, cadmium, and chromium. The results indicate DWF contributes approximately 10-30% of the total annual flow discharged from Ballona Creek. The annual DWF volume was fairly consistent; the variation in DWF percentage contribution was dependent on the highly variable volume of WWF. The relative contribution to the annual pollutant load varied considerably between each pollutant. In general, the DWF load was found to be significant, especially in years with lower precipitation totals. The results from this investigation have identified the relative relationship between DWF and WWF loads in the BCW and will aid in the decision-making process during the development of an integrated DWF-WWF management plan and allocation of water pollution control funds between DWF and WWF management.
本研究使用经验模型和确定性模型，比较了南加州高度城市化的巴洛纳溪流域（BCW）旱季径流（DWF）和雨季径流（WWF）中排放的潜在污染物的相对贡献。这些模型用于比较以下污染物的负荷：总悬浮固体、生化需氧量、总氮、总无机氮、凯氏氮总量、总磷、铜、铅、砷、镍、镉和铬。结果表明，DWF占巴洛纳溪年总径流量的约10%-30%。年DWF量相当稳定；DWF贡献率的变化取决于WWF量的高度变化。每种污染物对年污染物负荷的相对贡献差异很大。一般来说，发现DWF负荷很大，尤其是在降水总量较低的年份。本调查结果确定了BCW中DWF和WWF负荷之间的相对关系，并将有助于在制定综合DWF-WWF管理计划以及在DWF和WWF管理之间分配水污染控制资金的决策过程。
