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2 Ecological Engineering & Environmental Technology

2 2024

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Spatial Based Assessment of Land Use and Land Cover Change on the Different Landscape Patterns in the Wakatobi National Park, Indonesia

Surni Surni, Hanani Nuhfil, Riniwati Harsuko, Leksono Amin Setyo, Baja Sumbangan

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 12

117--131

The primary aim of this study was to assess multi-year land use and land cover (LULC) changes utilizing GIS techniques within different landscape patterns of the Wakatobi National Park, Indonesia. The study area, i.e., the Kapota Island is one of the important regions where its terrestrial ecosystem consists of protected and developed zones. A spatial pattern analysis technique was implemented to classify and assess changes in LULC from 1990 to 2020 using Landsat 5, 7, and 8 images. As many as 275 to 414 samples were used in the maximum likelihood procedure, and their accuracy was assessed following field investigations to understand the landscape response to LULC changes. A number of landscape metrics were calculated to understand the landscape patterns in the study region. The results of the analysis show that vegetated areas have changed from 1,111.6 ha in 1990, then to 1,410.9 and 1,227.5 ha in 2010, and 2020, respectively, and this is related to the climate, as during the peak dry season, planting patterns change, leading to a reduction in green cover compared to the rainy season. The results also reveal that landscape metric indices vary considerably according to the variation of nature conditions, especially in the extreme climate events and human intervention. This becomes the implication of the condition where the landscape pattern is realistically fragmented, and complex, with lower connectivity and greater diversity. This approach has proven effective in interpreting human interventions in land utilization, as well as assessing the influence of extreme climate events on ecosystem sustainability in small islands. The higher the spatial resolution of spatial images, the better the interpretation of ecological landscape structure, function, and changes. This study gives an important insight into spatial regulation, especially in the designation of spatial pattern delineation as well as land utilization and ecosystem management at small islands with a dominant protected function.

Analysis of the Impact of Land Use Change on Water Management Balance East Sinjai Regency, Indonesia

Samsia Samsia, Achmad Amran, Baja Sumbangan

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 7

260--273

This study aims to analyze the impact of land use change in East Sinjai Sub-district on the Kalamisu River Watershed and evelop water management strategies to balance availability with population needs. Utilizing GIS methods with ArcGIS 10.8 and Landsat satellite imagery, land use change in East Sinjai District was examined. Additionally, water infiltration capacity analysis considered factors such as rock type, rainfall, soil type, slope, and land use. Reference materials include the Technical Guidebook for Groundwater Management (DESDM Geological Agency, 2007) and the Regulation of the Minister of Forestry of the Republic of Indonesia No. P.32/MENHUTII/2009 on Procedures for the Preparation of RTkRHL-DAS. The study's outcomes will feed into a SWOT analysis to craft a management strategy for the area over the next decade. This research aims to contribute positively to the Sinjai Regency government and enhance scientific discourse on water governance and spatial management. Qualitative analysis was employed to elucidate the area's physical condition and analyze quantitative data and information pertinent to resource management processes and water management strategies. Primary data from satellite image interpretation and interviews supplemented by secondary data were utilized for problem identification and data analysis. The analysis indicates a substantial increase in land use in East Sinjai Sub-district from 2012 to 2017, notably in residential areas, with a rise of 136.6 hectares due to a population surge of 58,986 people. Water infiltration in the Kalamisu River watershed is critically low. Water availability in East Sinjai District has notably decreased by -4,658,505 cubic meters per year from 2012 to 2022. To enhance groundwater absorption capacity and availability, promoting the use of high water-absorbent plantation land is essential. Additionally, developing mangrove areas is crucial for improving water infiltration, particularly in quality and quantity, especially during dry seasons.