| Summary: | 碩士 === 國立中山大學 === 環境工程研究所 === 91 === Abstract
The Love River basin is the most important river watershed in Kaohsiung City, Taiwan. It is 16-km long, drains a catchment of more than 50 km2. Figure 1 shows the Love River, its catchment, the sewer system and the manmade water ways for collecting the municipal wastewater from households (D,H,K,Bao-zhu,No.2). The pump stations were settled to pump the domestic waste water to the sewer system . The 16-km river begins as a trickle of runoff in the mountains of Kaoshiung County before flowing through the city and finally emptying into the Taiwan Strait. The drainage area is 5,600 hectares, and the population in the area is around 720,000.
Investigation results demonstrate that the main water pollution sources are municipal wastewater, industrial wastewater, non-point source (NPS) pollutants, agricultural wastewater, and livestock wastewater. Investigation results show that the municipal wastewaters contribute more than 90% of the overall pollution loads to Love River, respectively. Currently, the percent of sewer system connection in the Love River watershed is less than 50%. Part of the municipal wastewater is discharged into the river without treatment. Moreover, there are 55 registered industrial factories discharge their wastewater into the Love River. Illegal or expedient discharges are sometimes practiced feeding polluted industrial flows into the river. Therefore, the untreated municipal wastewaters is the major cause of the poor water quality.
The major objectives of this study were using the calibrated WASP water quality model (1) to obtain to evaluate the carrying capacity calculations for BOD . (2)to assess the improved effect to water quality by dilution of the river source water (3) to assess the improved effect to water quality by settling the local waste disposal beside the pumping station(4) to evaluate the improved effect to water quality by construction of riverbank natural treatment systems, and (5) to evaluate the improved effect to water quality by raising the popularity rate of hygienic sewers piping for users .
Results from this study will provide the predicted remedial effects before bringing all sorts of costly remedial constructions into practice. Due to the construction of the sewer system was time-cosuming and expensively, and if the water quality of Love River was expected to be improved in the short-term , the comprehensive strategies for Love River watershed management could been proposed .
Key Words Water quality; watershed; carrying capacity; BOD
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