Muhammetoğlu A, Muhammetoğlu H, Soyupak S
Akdeniz University, Environmental Pollution and Control Program, Antalya, Turkey.
Water Sci Technol. 2002;45(9):195-203.
Mogan Lake is an important recreational area for Metropolitan Ankara-Turkey. It is a shallow eutrophic lake with a dense growth of macrophytes. The main contributors of nutrients and other pollutants to the lake are the creeks carrying the runoff water from the watershed and upland farming land, in addition to the domestic and industrial wastewater discharges from a nearby town and industries. Hydrodynamic and water quality modeling techniques were used to determine the optimum management schemes for the lake restoration and diffuse pollution control. Management scenarios were devised and tested to control allochthonous and autochthonous nutrient inputs to the lake. Phosphorus and nitrogen load reductions were the main test elements for the control of allochthonous nutrient inputs. The scenario analysis revealed that reduction of phosphorus and nitrogen loads from diffused sources will have a marginal effect on controlling eutrophication if macrophyte growth is left uncontrolled. Scenarios employing macrophyte harvesting and sediment dredging have been evaluated for autochthonous nutrient input control. Sediment dredging alone has been shown to yield the most favorable conditions for water quality improvement in Mogan Lake. Further, control of diffuse pollution was an essential final step to achieve an acceptable long-term sustainable water quality improvement in the lake.
莫甘湖是土耳其安卡拉大都市重要的休闲区。它是一个浅水富营养化湖泊，大型水生植物生长密集。除了附近城镇和工业排放的生活污水和工业废水外，携带流域和高地农田径流的小溪是湖泊营养物质和其他污染物的主要来源。采用水动力和水质模拟技术来确定湖泊修复和分散污染控制的最佳管理方案。设计并测试了管理方案，以控制湖泊的外源和内源营养物质输入。减少磷和氮负荷是控制外源营养物质输入的主要测试要素。情景分析表明，如果大型水生植物的生长得不到控制，减少来自分散源的磷和氮负荷对控制富营养化的影响微乎其微。已经评估了采用大型水生植物收获和底泥疏浚的方案来控制内源营养物质输入。仅底泥疏浚就已被证明能为莫甘湖水质改善创造最有利的条件。此外，控制分散污染是实现湖泊长期可持续水质改善的关键最后一步。
