Analisis Kesesuaian Lokasi Bendung Kecil dan Daerah Pemanenan Air Hujan (PAH) dengan Menggunakan Sistem Informasi Geogerafis (SIG) di Wilayah Perkotaan

Abstract

<jats:p>Assessment of site suitability for water harvesting in Sentul City is an important, because the Sentul City area often problems with water supply and is expected to prediction a water deficit in 2050, other problems are floods often occur in the downstream during the rainy season. This study aims to analyze the suitability of the location for small dam and reservoirs determine the number of small dam and reservoirs that can be built in Sentul City based on location suitability maps. Identifying locations for the construction of small dam and reservoirs can use of Geographic Information System (GIS), the approach used multi criteria analysis and weighted overlay techniques with software ArcGIS. Six criteria were considered for this study, which include topographic factors (slope), land use, soil texture, rainfall, and distance to the river and distance to the road. The multi criteria analysis approach, each criterion was assigned a weight with slope being considered as the most important factor. Weighted overlay analysis was performed in ArcGIS and determination of suitable small dam and reservoir site was done from the summation of weight of each contributing factor. A final suitability map was generated which indicated that 34% of the total study area showed that the area was not suitable, 31% highly suitable, 27% was suitable, 6% was moderately suitable and 2% was low suitable for dam construction. Based on suitable map, 5 (five) samall dam and 9 (nine) reservoir can be used to water harvesting that can be used as raw water sources in Sentul City.</jats:p>

Mapping Potential Locations of Reservoir Development Planning Based on Biogeophysical Conditions in Bulok Watershed of Lampung Province

“…The construction of reservoirs should be carried out in areas with clay/smooth soil lithology types, which do not easily absorb water, or which often cause puddles. This is in line with the opinion of Hermawan et al, (2020), in their research which states that fine to medium textures are more suitable for water harvesting because they have high storage capabilities.…”

Identifikasi Lokasi Potensial Panen Air Hujan Menggunakan Indeks Kesesuaian Embung dan Sistem Informasi Geografi di Provinsi Jawa Timur Indonesia

“…Provinsi Jawa Timur Pada sisi lain, tekstur tanah menentukan penyerapan air (infiltration) dan penyimpanan air (storage) di dalam tanah. Tekstur halus hingga menengah lebih sesuai untuk pemanenan air karena memiliki kemampuan penyimpanan yang tinggi (Hermawan et al, 2020). Tekstur tanah di wilayah Provinsi Jawa Timur didominasi oleh tekstur halus dengan kategori "sesuai" sampai dengan "sangat sesuai" dengan lokasi potensial pembangunan embung sebesar 58,8% utamanya di dataran rendah (Gambar 3).…”

System Dynamic Model for Sustainable Water Supply Strategy in Sentul City Area

“…PDAM (Local Water Supply Utility) Tirta Kahuripan currently provided 200 l/s, Sentul City water treatment plant 80 l/s, and Sentul City wastewater treatment plant 0.03 l/s. Based on existing sources capacity, Sentul City can fulfill water needs of about 280.03 l/s or 16 130 m 3 /day (Hermawan et al, 2020). Harahap (2018) predicted that in 2050 Sentul City could only fulfill 59.90% of water needs because of population growth that increases water demand.…”