Abstract
A Watershed is a land area that is an integral part of the river and its tributaries, which functions to accommodate, store and drain water from rainfall to lakes or to the sea naturally, whose boundaries on land are topographical separators. And boundaries at sea up to water areas that are still affected by land activities. This study aims as follows: 1) To assess the current water quality in the Boentuka Sub-watershed, Timor Tengah Selatan Regency, 2) Identify the factors causing water pollution entering the Boentuka Sub-watershed, 3) Formulate Strategic Recommendations on Water Pollution Control to the District Government South Central Timor in water quality management and efforts to control water pollution in the Boentuka Sub-watershed. This research method is descriptive with a laboratory-based quantitative approach to describe the condition of river water quality status in the Boentuka Sub-watershed area and the pollution load originating from residential and agricultural activities of local residents. d. The results of the SWOT analysis state that the strategic recommendations that need to be made to control the level of water pollution in the Boentuka Sub-watershed area are (a) the need for a technical study on the determination of river water classes and the carrying capacity of river water pollution loads as the basis for river pollution control policies; and (b) Increasing the frequency of supervision and monitoring activities by the relevant agencies on settlement activities, agriculture and or other activities that contribute to increasing river water pollution.
Highlights
Watershed (DAS) is an area bounded by mountain ridges where rainwater that falls on the area will be accommodated by the mountain ridge and will be channelled through small rivers to the main river (Asdak in Novita Sari, 2014; Bahri, 2014). et al, 2019)
This research was carried out in several stages, namely site surveys, determination of the existing condition of the Boentuka Subwatershed through physical-chemical and biological analysis of river water using the standard procedures of American Public Health Association methods (US APHA 1998), determining the status of river water quality using the Pollution Index method. (IP) and the STORET method, and developing a strategy for controlling water pollution in the Boentuka Sub-watershed as feedback and a followup to the study of pollution load and water quality using SWOT analysis. 3.2 Research Implementation Procedures
The results of measurements and observations of fecal coliform (FC) at the research site from upstream to downstream can be seen in the following figure
Summary
Watershed (DAS) is an area bounded by mountain ridges where rainwater that falls on the area will be accommodated by the mountain ridge and will be channelled through small rivers to the main river (Asdak in Novita Sari, 2014; Bahri, 2014). et al, 2019). Rivers are open waters that flow all the time so that they get input from discharges from various human activities in the area where they live, agriculture and household industries in the vicinity. The input of waste into the river causes physical, chemical and microbiological changes in river waters. This change can have an impact on decreasing river water quality (Asdak, 2014). Changes in land-use patterns into agricultural land, moor and settlements, and increased industrial activity will impact hydrological conditions in a watershed. Changes in land-use patterns mean that there has been a change in the amount and type of ground cover vegetation (Asdak, 2014; Natsir, 2015)
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