密云水庫(kù)水質(zhì)變化趨勢(shì)研究

摘要： 為模擬近年來(lái)密云水庫(kù)水位不斷下降引起的水質(zhì)變化的問(wèn)題,開發(fā)了三維生態(tài)動(dòng)力學(xué)模型來(lái)進(jìn)行密云水庫(kù)水質(zhì)模擬,該模型耦合了水質(zhì)模型WASP和水動(dòng)力學(xué)模型EFDC.首先進(jìn)行了模型參數(shù)率定和驗(yàn)證.在此基礎(chǔ)上,研究模擬了4個(gè)情景方案(S1,S21,S22和S23).結(jié)果表明,密云水庫(kù)處于低水位時(shí),水質(zhì)受來(lái)水水量和營(yíng)養(yǎng)物負(fù)荷的影響顯著.當(dāng)出現(xiàn)一次大來(lái)水量,入庫(kù)負(fù)荷增大,葉綠素a的質(zhì)量濃度可能在很大區(qū)域內(nèi)都超過(guò)10 μg/L的富營(yíng)養(yǎng)化警戒線.同時(shí),情景S23表明,控制TP負(fù)荷可有效降低葉綠素的質(zhì)量濃度,水庫(kù)水質(zhì)能得到有效改善或保持現(xiàn)狀. Abstract： In order to simulate changes in the water quality of the Miyun Reservoir due to continuous descent of surface water level,a 3-D ecological hydrodynamic model was developed through coupling the water quality analysis simulation program (WASP) with the environmental fluid dynamics code (EFDC).The model was then calibrated and verified.Four scenarios (S1,S21,S22 and S23) were simulated using the model.Results show that the water quality of the Miyun Reservoir under conditions of low surface water level is apparently affected by different amounts of inflow and different total phosphorus (TP) loadings.The chlorophyll-a concentration might exceed 10 μg/L in many areas of the Miyun Reservoir (This limitative value is seen as a critical value of eutrophication) when large loadings of TP enter due to the amount of inflow increasing.Results of scenario S23 indicate that control of TP loadings can decrease chlorophyll-a concentration effectively,and the water quality of the Miyun Reservoir will improve or retain its status quo. 作 者： 王建平    程聲通    賈海峰    Wang Jianping    CHENG Shengtong    JIA Haifeng   作者單位： 清華大學(xué)環(huán)境科學(xué)與工程系,北京,100084  期 刊： 東南大學(xué)學(xué)報(bào)（英文版）  EI   Journal： JOURNAL OF SOUTHEAST UNIVERSITY(ENGLISH EDITION)  年，卷(期)： 2005, 21(2)  分類號(hào)： X143  關(guān)鍵詞： 水質(zhì)模型    水動(dòng)力學(xué)模型    情景分析    變化趨勢(shì)    Keywords： water quality model    hydrodynamic model    scenario analysis    changing trends   

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