Abstract
After the Palu earthquake in 2018, there were many paddy fields has been impacted by liquefaction in three locations, namely, Sibalaya is around 30 Ha, Jono Oge is about 1784 ha, and Petobo was affected around 388 Ha. The entire paddy fields affected are about 2.202 Ha. The procedure model was used to analyse the most suitable location for the rainfed agricultural and irrigated crops after the Palu Earthquake in September 2018. Four levels of land suitability class were pre-pared based on five criteria: rainfall, temperature, slope percentage, soil types, and the spatial distribution of groundwater wells. The process in land suitability analysis with GIS after the suitability class of each parameter is an overlay process after some exploration and testing with the Land; the results show about 65% of the paddy fields land is in category S2; this limiting factor will affect its productivity, requiring additional inputs. The land users themselves can usually overcome these boundaries. And others about in class S3 is about 35% Paddy fields Land has a heavy limiting factor, which will significantly affect its productivity, requiring more additional input than Land Classified as S2. To overcome the limiting factor in S3 requires high capital, so there needs to be assistance or intervention (intervention) from the government or the private sector.
Highlights
1.1 BackgroundIndonesia lies in a tectonically active region and is exposed to a range of related natural hazards
The following are the conclusions of the Gumbasa Land Use and Land Suitability research: 1. The map projection used in the Gumbasa project follows the Indonesian National Standard (SNI) for Specifications for Presentation of topographic maps or base maps at a scale of 1:25,000 and for 1:1:50,000 (SNI 6502.2:2010 and SNI 6502.3:2010), which officially uses a map projection system UTM
Gumbasa is located in the UTM 50S zone; topographic/slope data is based on 1m resolution of LiDAR by the Geospatial Information Agency (BIG) (National Geospatial Information Agency) data captured in 2018
Summary
Indonesia lies in a tectonically active region and is exposed to a range of related natural hazards. The disaster has caused extensive damage to human settlements and buildings (houses, government offices, schools, hospitals and health centres) and infrastructure (roads, water supply, sanitation and irrigation facilities). 69,000 houses have been damaged, of, which 3,800 houses were damaged by liquefaction; 1,509 schools have been damaged and (temporarily) closed; 67 health centers and 17 hospitals suffered damages, limiting (or preventing entirely) their ability to provide health services; Some 42 km of raw water transmission and 100 km of water supply systems were damaged, causing people to rely on groundwater resources;Some 95 km of the canals in the Gumbasa irrigation system have been damaged, and the entire. 8,180 command area is (for ) not being irrigated; and some 16 km of river works and about 20 km of coastal protection works have been damaged, exposing some 30,000 households to flooding risks. On 28 April 2019, the Gumbasa area suffered from flooding of the Bangga River. The Gumbasa irrigation system is more extensive than 3,000 Ha and is classified as a central government scheme
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