CAJ | 학술논문

以2001～2007年实测水文、水质数据为基础,计算了四川省主要出川断面高锰酸盐指数（CODMn）和氨氮（NH3-N）污染负荷通量;利用断面水质目标约束,通过污染负荷历时曲线,分析了区域水环境承载力;在基流分割的基础上,利用水文分割法,识别了区域污染物的主要来源,为从源头上开展三峡水库水环境保护提供数据支撑。分析结果表明,各出川断面干流主要污染物（CODMn、NH3-N）大致在可接受的范围内,2001年以来,出川断面CODMn通量呈降低的趋势,有效的减缓了输入三峡库区的污染物总量,氨氮通量整体稳定。嘉陵江、涪江、渠江流域污染物来源主要为非点源,应重点加强面源的污染防控;长江干流为点面源混合型,简单的削减点源已不能保证高功能水体要求,应加强点源和面源污染的综合防控。
이2001～2007년실측수문、수질수거위기출,계산료사천성주요출천단면고맹산염지수（CODMn）화안담（NH3-N）오염부하통량;이용단면수질목표약속,통과오염부하력시곡선,분석료구역수배경승재력;재기류분할적기출상,이용수문분할법,식별료구역오염물적주요래원,위종원두상개전삼협수고수배경보호제공수거지탱。분석결과표명,각출천단면간류주요오염물（CODMn、NH3-N）대치재가접수적범위내,2001년이래,출천단면CODMn통량정강저적추세,유효적감완료수입삼협고구적오염물총량,안담통량정체은정。가릉강、부강、거강류역오염물래원주요위비점원,응중점가강면원적오염방공;장강간류위점면원혼합형,간단적삭감점원이불능보증고공능수체요구,응가강점원화면원오염적종합방공。
In this study, based on the data of hydrology and water quality determined during 2001 - 2007, the sectional fluxes of CODMn and NH3-N flowing out of Sichuan province were calculated. According tO the goal constraint of water quality and duration curves of pollution load, the pollution bearing capability of the local water was analyzed. Based on the base flow separation, hydrograph segmentation was used to identify the main sources of the local pollutants, which provided data support in water environmental protection from headstream for the Three Gorges Reservoir. The results showed that the sectional fluxes of CODMn and NH3-N flowing out of every main river were environmentally acceptable. Since 2001 the outflow flux of CODMn had appeared a reducing tendency, which greatly eased off the total pollutants of the Three Gorges Reservoir area. The outflo~ng flux of NH3-N was stable. In the valleys of Jaling River, Fujiang River and Qujiang River, the main pollutants sourced from point sources, but the non-point sources pollution still needed control; in the valleys of Yangtze River, there were both non-point source and point source pollutions. It was not available to reduce point sources only for getting high quality water, so a comprehensive prevention and controlling of both non-point source and point source pollutions should be strengthened.