Abstract
Dibawah Lake is a tectonic lake located in Solok Regency, West Sumatra. It's functioned as the West Sumatra Government as a tourist area, besides that it was also used as an irrigation water source. This study aims to obtain information on the characteristics of lake morphometry and formulate the concept of integrated management of Dibawah Lake Catchment Area. From the results of bathymetry mapping produces a lake area of 10998.1 ha with a circumference of 17.2 km, a maximum length of 6.4 km, a maximum width of 3 km, a maximum depth of 326.8 m, an average depth of 164.3 m and volume of 1688 million m 3. The lake catchment area is 2881.7 ha and it is divided into 27 sub-catchments. The existing problems in the Dibawah Lake are (1) changes in lake area land cover into agricultural fields, (2) agricultural cropping patterns in slope areas, (3) lakefront settlements, (4) water quality degradation, (5) fish cages floating net and fishing ring. From the results of the SWOT analysis, the W-T (Weaknesses - Threats) strategy was chosen as the top priority. The W-T strategy focuses on strengthening and drafting rules, monitoring the implementation of rules, enforcing violations and socialization of the community.
Highlights
Lake is a large natural basin surrounded by land which holds and deviates from water from rainwater, springs, seepage and river water
This study aims to examine the condition of Dibawah Lake Morphometry and Integrated Lake Catchment Area management
In this study data and information are sourced from primary and secondary data which are analyzed spatially to delineate Lake Catchment Area and determine lake morphometry, using the SWOT method to approach the concept of integrated Lake Catchment Area management
Summary
Lake is a large natural basin surrounded by land which holds and deviates from water from rainwater, springs, seepage and river water. In Indonesia, observations have been made on the condition of the lakes. There are 15 priority lakes that are included in the national lake rescue program or known as GERMADAN (Lake Rescue Movement) (Kementerian LH, 2011). Some lakes including Lake Maninjau, Toba, Limboto and Rawapening are in critical condition. The causes of the critical condition are high levels of sedimentation and poor water quality (Apriyani 2017). Diatas and Dibawah Lake or often called Twin Lakes is a tectonic lake which is located at an altitude of 1531 meters above sea level and 1462 meters above sea level (Pasilehmusluoto, 1997)
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