Water pollution control technology and strategy for river–lake systems: a case study in Gehu Lake and Taige Canal

Abstract

The Taoge water system is located in the upstream of Taihu Lake basin and is characterized by its multi-connected rivers and lakes. In this paper, current analyses of hydrology, hydrodynamics and water pollution of Gehu Lake and Taige Canal are presented. Several technologies are proposed for pollution prevention and control, and water environmental protection in the Taihu Lake basin. These included water pollution control integration technology for the water systems of Gehu Lake, Taige Canal and Caoqiao River. Additionally, river-lake water quality and quantity regulation technology, ecological restoration technology for polluted and degraded water bodies, and water environmental integration management and optimization strategies were also examined. The main objectives of these strategies are to: (a) improve environmental quality of relative water bodies, prevent pollutants from entering Gehu Lake and Taige Canal, and ensure that the clean water after the pre-treatment through Gehu Lake is not polluted before entering the Taihu Lake through Taige Canal; (b) stably and efficiently intercept and decrease the pollution load entering the lake through enhancing the river outlet ecological system structure function and water self-purifying capacity, and (c) designate Gehu Lake as a regulation system for water quality and water quantity in the Taoge water system and thus guarantee the improvement of the water quality of the inflow into Taihu Lake.

Water Environment Characteristics at Taige Canal-Taihu Lake: a Comparative Study on Interaction between Chlorophyll α and Environmental Variables

“…The Taige Canal and Caoqiao River are two main pollution sources to the upstream portion of Taihu Lake [4]. Zhushan Bay is one of the five most important bays of Taihu receiving waters from the canal.…”

“…Intercepting pollutants at RLCSs of a lake is an excellent strategy. In Gehu lake-Taige Canal RLCS, engineering technologies including pre-reservoir technology and ecological interception technology were used to intercept pollutants [4]. Significant improvement of water quality was achieved in the demonstration project [4].…”

“…This system is also interfered with by many human activities, for example aquaculture and shipping. So, for its special geographical position and ecological significance, RLCS has been paid great attention in control of lake eutrophication [4]. Many water pollution control technologies and strategies had been practiced in Gehu Lake-Taige Canal RLCS [4], including pre-reservoirs technology, ecological interception technology, and non-point source pollution control technology.…”

“…So, for its special geographical position and ecological significance, RLCS has been paid great attention in control of lake eutrophication [4]. Many water pollution control technologies and strategies had been practiced in Gehu Lake-Taige Canal RLCS [4], including pre-reservoirs technology, ecological interception technology, and non-point source pollution control technology. All these countermeasures are proposed based on characteristics of Gehu Lake-Taige Canal RLCS [4].…”

“…Many water pollution control technologies and strategies had been practiced in Gehu Lake-Taige Canal RLCS [4], including pre-reservoirs technology, ecological interception technology, and non-point source pollution control technology. All these countermeasures are proposed based on characteristics of Gehu Lake-Taige Canal RLCS [4]. Regular monitoring is important for theoretical research and engineering practice [5,6].…”