Abstract:Project of Prediction in Ungauged Basins (PUB) was carried out in 2003 to solve the difficulty with regards to calculation of runoff without observation. Few studies focused on the mass fluxes in ungauged basin were reported. To investigate monthly runoff, mass fluxes and ecological compensation in ungauged trans-boundary watershed, monthly runoff was estimated by using SCS model developed by Soil Conservation Service, U.S. Water samples were collected from different sections between varied districts in February, June and November, 2012 to analyze the concentration of N, P nutrients and heavy metals, and main mass fluxes and contribution rates of contaminants from different districts were estimated in combination with the calculated monthly runoff in 2012. The results showed that the maximum and minimum monthly runoff during the investigated periods (1970~2012) were 9.12×108m3 in June 2008 and 8.61×106m3 which was base flow, and the maximum and minimum annual runoff were 1.75×109m3 and 5.32×108m3 occurred in 1974 and 2006, respectively. Water quality was severely polluted by varied contaminants in different periods. The ranges of heavy metals concentration were 0.38~0.75mg/L for Mn, 0.09~0.49mg/L for Zn, n.d.-0.09mg/L for Cu and 0.55~9.86mg/L for Fe in February, however, the pollution type was converted to nutrients (N and P) in June and November. Concentration of total nitrogen and total phosphorus ranged from 6.66to 30.1mg/L and 0.05 to 2.49mg/L, respectively. Shima river transported 318.16 tons of metals, 12029.31tons of nitrogen and 203.35tons of phosphorus to the Pearl River Delta in 2012. Duringthe 3investigated periods, the average contribution rates of nitrogen and phosphorus followed the sequences as Huizhou (59.78% and 45.22%)>Dongguan (35.50% and 38.92%)> Shenzhen (4.71% and 15.86%), and that of heavy metals was given as Dongguan (43.90%)> Huizhou(42.57%)> Shenzhen(13.52%).
高磊, 陈建耀, 朱爱萍, 付丛生, 王江, 柯志庭. 基于SCS模型的跨界小流域物质通量估算[J]. 中国环境科学, 2015, 35(3): 925-933.
GAO Lei, CHEN Jian-Yao, ZHU Ai-Ping, FU Cong-Sheng, WANG Jiang, KE Zhi-Ting. Calculation of masses flux in a transboundary catchment based on SCS model: A case study in Shima River catchment, Dongguan City. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(3): 925-933.