Abstract
The coastal plain region usually shows the agricultural dominated industry mode, so more and more attention is paid to non-point pollutants discharge. In this study, the method for assessing the influence of non-point pollutants discharge on river water quality is probed which is concluded as follows: (1) Considering the costal plain island is characterized as nearly even elevation, the conventional gravitational runoff confluence method based on eight-point gravitational flowing directions (D8) is unable to compute the runoff confluence received by the surrounding rivers, so a new method of triangular confluence based on three-points of grid center and the river segments is presented. Further the equations of non-point pollutants loads estimation and non-point pollutants confluence on rivers are presented. (2) The integration mode of non-point pollutants model and river water quality model is presented so as to further assess the non-point pollutants contribution to river water quality. (3) With the Chongming Island, the third largest island in China, as an example, the above-mentioned equations are specified. For this island, the non-point pollutants loads are estimated and linked to the developed water quality model of the river network in the island, and further the non-point pollution evolution in river network is simulated. In this scenario, the non-point pollution contribution to river water quality over the whole island is clearly displayed, and the area where the river water quality is seriously influenced by non-point pollutants discharge is distinctly depicted. This scenario also shows the water quality contribution ratio of non-point pollution to point pollution can be in the range of 55.5% to 44.5% which proves the importance of non-point pollution control in costal plain islands.
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References
NORTON M. M., FISHER T. R. The effects of forest on stream water quality in two coastal plain watersheds of the Chesapeake Bay [J]. Ecological Engineering, 2000, 14(4): 337–362.
LEÓN L. F., BOOTY W. G. and BOWEN G. S. et al. Validation of an agricultural non-point source model in a watershed in southern Ontario [J]. Agricultural Water Management, 2004, 65(1): 59–75.
MORARI F., LUGATO E. and BORIN M. An integrated non-point source model-GIS system for selecting criteria of best management practices in the Po Valley, North Italy [J]. Agriculture, Ecosystems and Environment, 2004, 102(3): 247–262.
HAO Fang-hua, CHENG Hong-guang and YANG Sheng-tian. Non-point pollution model-theory and application [M]. Beijing: China Environmental Science Press, 2006 (in Chinese).
TANG Guo-an, LIU Xue-jun and LU Guo-nian. Principle and method of digital elevation model and geo-science analysis [M]. Beijing: Science Press, 2006 (in Chinese).
GU Jue-rong, LIU Dong-sheng. Study on non-point source modeling of Suzhou Creek water system and application [J]. Shanghai Environmental Science, 2003, 22(Suppl.) 50–52 (in Chinese).
QUIN P. F., BEVEN K. J. and CHEVALLIER P. The prediction of hillslope flow paths for distributed hydrological modeling using digital terrain models[J]. Hydrological Processes, 1991, 5(1): 59–79.
HE Bao-gen, CHEN Chun-gen and ZHOU Nai-sheng. Urbanized area runoff coefficient and its application [J]. Shanghai Environmental Science, 2003, 22(7): 472–475 (in Chinese).
HU Cheng, PAN Mei-xia. Evaluating urban non-point pollution load [J]. Journal of Meteorology and Environment, 2006, 22(5): 14–18 (in Chinese).
HUANG Shen-fa, CHEN Chang-hong. Surface runoff analysis on farmland precipitation in Huangpu River Basin [J]. Shanghai Environmental Science, 1998, 17(3): 21–23 (in Chinese).
ZHANG Da-di, ZHANG Xiao-hong and ZHANG Jia-qi et al. Integrated research and evaluation on non-point source pollution in Shanghai suburbs [J]. Acta Agricultural Shanghai, 1997, 13(1): 31–36 (in Chinese).
XU Zu-xin, LU Shi-qiang. Hydrodynamic model for tidal river network [J]. Journal of Hydrodynmaics, Ser. A, 2003, 18(2): 176–181 (in Chinese).
XU Zu-xin, YIN Hai-long. Development of coupled 1D-2D mathematical models for tidal rivers [J]. Journal of Hydrodynamics Ser. B, 2004,16(6):767–776.
ZHOU Yi-lin, TANG Hong-wu and LIU Xiao-hua. A split-characteristic finite element model for 1-D unsteady flows[J]. Journal of Hydrodynamics, Ser. B, 2007, 19(1): 54–61.
LI Yu-xiang, PANG Yong. Hydrodynamic model for river network in Pearl River Delta [J]. Journal of Hydrodynamics, Ser. A, 2001, 16(2): 685–692 (in Chinese).
WANG Chao, WANG Pei-fang. Model of calculating water quality needed to dilute and purify pollutants in river networks and its application [J]. Journal of Hydrodynamics, Ser. B, 2005, 17(4): 418–428.
ZHAN Jie-min, LÜ Man-ying and LI Yu-xiang et al. An efficient, accurate and applicable numerical model for unsteady flows in river networks [J]. Journal of Hydrodynmaics, Ser. A, 2006, 21(6): 685–692 (in Chinese).
ZHANG Ming-liang, SHEN Yong-ming. Study and application of steady flow and unsteady flow mathematical model for channel networks[J]. Journal of Hydrodynmaics, Ser. B, 2007,19(5): 572–578.
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Project supported by the Scientific Research Project of Chongming Island of Shanghai Science and Technology Commision(Grant No. 06dz12037)
Biography: YIN Hai-long (1976-), Male, Ph. D., Lecturer
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Yin, Hl., Jiang, Wy. & Li, Jh. Simulation of Non-Point Pollutants Evolution in Coastal Plain Island—a Case Study of Chongming Island. J Hydrodyn 20, 246–253 (2008). https://doi.org/10.1016/S1001-6058(08)60053-0
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DOI: https://doi.org/10.1016/S1001-6058(08)60053-0