【摘要】：根據(jù)入湖污染負荷監(jiān)測、調(diào)查資料和不同水文條件下流場-水質(zhì)同步監(jiān)測資料,應(yīng)用數(shù)理統(tǒng)計方法,研究了鄱陽湖氮磷營養(yǎng)物質(zhì)分布、轉(zhuǎn)移和削減特征。研究結(jié)果顯示:(1)總磷、總氮是影響鄱陽湖水環(huán)境質(zhì)量的主要污染物,入湖污染負荷與入湖徑流水量緊密正相關(guān)。(2)鄱陽湖換水周期短,水流更換頻繁,氮磷污染物在湖區(qū)不會充分混合;氮磷超標水域隨著水體流動,逐步向下游轉(zhuǎn)移、擴散;湖水位處于消落狀態(tài),通江水道部分水域氮磷濃度超標。(3)湖相狀態(tài)水環(huán)境比河相好,湖相狀態(tài)一般不會出現(xiàn)大面積的總氮和總磷同時超標。(4)鄱陽湖水環(huán)境勉強維持Ⅲ類標準,如果出現(xiàn)損害環(huán)境的人類活動,脆弱的水環(huán)境將會惡化。針對這些特征提出了保護鄱陽湖"一湖清水"的對策建議。
[Abstract]:The distribution, transfer and reduction of nitrogen and phosphorus nutrients in Poyang Lake were studied by means of mathematical statistics according to the monitoring data of pollution load, investigation data and synchronous monitoring data of flow field and water quality under different hydrological conditions. The results show that: (1) Total phosphorus and total nitrogen are the main pollutants affecting the water environment quality of Poyang Lake, and the pollution load of the lake is closely related to the runoff water quantity. (2) the water exchange period is short and the water flow changes frequently in Poyang Lake. Nitrogen and phosphorus pollutants will not be fully mixed in the lake area; nitrogen and phosphorus excess waters will gradually move downstream with the flow of water, and the lake water level will be in a state of decline, and the nitrogen and phosphorus concentrations in some parts of the Tongjiang waterway will exceed the standard. (3) the water environment in the lacustrine phase is better than that in the river. In general, large areas of total nitrogen and total phosphorus do not exceed the standard. (4) the water environment of Poyang Lake barely maintains the class 鈪，

本文編號：2184418