Abstract
Water pollution has become a serious worldwide problem, especially for lakes with a large stagnant water body. Is it possible to develop high quality water from a heavily polluted river system quickly? This paper introduces an innovative technology termed SPP (separation, prevention and protection) for this purpose. Its feasibility is preliminarily examined using Dianshan Lake in Shang- hai as an example. Due to its very high population density and intensive industrial activities, almost all waterways in Shanghai are heavily polluted, including the lake. However, the data analysis shows that clean water always appears after heavy rains, especially in its suburban areas. Once the 1st flush water is discharged to downstream, high-quality water can be developed from its Dianshan Lake by using the SPP strategy. The Vollenweider model is used to analyze SPP’s feasibility. The results show that the water quality of the Dianshan Lake can be remediated as a drinking water source within 120 days if the SPP strategy is applied. It is suggested that Jinze reservoir’s water should come from the Dianshan lake, not Taipu River to improve the quality of water supply. It is highly recommended for other cities in the world to consider the SPP technology if needed.
Highlights
The total water volume of Earth is about 1.41 × 109 km3
The results show that the water quality of the Dianshan Lake can be remediated as a drinking water source within 120 days if the SPP strategy is applied
The above shows that if the Total Phosphorus (TP) in the incoming water remains at the 2009 level, using the SPP scheme, about 1 × 109 m3 water could be developed with water quality ranging from class II to III
Summary
The total water volume of Earth is about 1.41 × 109 km. The volume of freshwater resources is around 35 million km. This nearly constant water quantity needs to support the entire ecosystem and total population. The latter is steadily increasing by roughly 85 million per year [1]. In 2000s, about 80 countries with 40% of the world’s population, were experiencing water stress, and about 30 of these countries are suffering water scarcity during a large part of the year [2], this number is expected to reach 34 by the year 2025 [1]. About 2/3 of the global population suffer from freshwater scarcity [3]
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