Green Cimahi watershed for balancing water supply and flood control

Safarina, Ariani Budi; Karnisah, Iin; Permana, Ade Sena; Sufianto, D.

doi:10.1088/1757-899x/669/1/012040

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Land use changes due to population growth have caused the condition of water availability in the Cimahi sub-watershed to be low or even shortage, especially from surface water. This condition is exacerbated by the occurrence of a dry season with little or no rainfall for aproximately six months [8]. In addition, pollution from the domestic, agricultural, and industrial sectors causes the water quality of the Cimahi river to be in a heavily polluted condition.…”

Section: Resultsmentioning

confidence: 99%

Application of Watershed Carrying Capacity and Sustainability Index (Case Study: Cimahi Sub-Watershed)

Hikmat

Marselina

2021

IOP Conf. Ser.: Earth Environ. Sci.

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Activities carried out in Cimahi City are quite diverse so that can affect the decline in environmental quality, one of which is the sub-watershed. This condition explains that a study on the application of watershed carrying capacity and sustainabiliy index needs to be carried out to provide a comprehensive picture of the environmental conditions. The index is developed based on the study of carrying capacity and sustainability. The two studies are combined to complement the indicators that do not exist in each study. In general, the two studies consist of three main components, namely land, water resources, and social, economic, and institutional. The results of the study are then analyzed using the DPSIR framework. The analysis show that the sub-watershed is classified as poor performance. The final value obtained from the watershed sustainability study is 11,11. There are 13 out of 26 indicators that have poor performance. All indicators with these performances are priority actions. This research can be used by the government to create a management strategy for the Cimahi sub-watershed.

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Section: Resultsmentioning

confidence: 99%

Application of Watershed Carrying Capacity and Sustainability Index (Case Study: Cimahi Sub-Watershed)

Hikmat

Marselina

2021

IOP Conf. Ser.: Earth Environ. Sci.

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“…Load discharges are calculated based on design rainfall that is multiplied convolutive (Equation 2) after being converted into effective rainfall [12], [13]. Design rainfall is calculated using Gumbel frequency analysis while effective rainfall is calculated using a runoff coefficient derived from the land use map.…”

Section: B Flood Risk Quantification Analysis Modelmentioning

confidence: 99%

Flood Quantification Index Based on Inundation Indicators and Risk Scale

Safarina

Karnisah

Permana

et al. 2021

Int. J. Adv. Sci. Eng. Inf. Technol.

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Flood management requires an assessment of flood levels that occur appropriately. Determining flood levels quantitatively can help control floods more efficiently. This study aims to make flood quantification based on the inundation indicators and scale of risk. The case study is in Citarik, Cilember, Cimahi, Cisangkan, and Cibeureum, located in the Citarum watershed, West Java, Indonesia. The method used is a mathematical model of flow verified by the river's physical dimensions. Four indicators were analyzed based on unsteady one-dimensional river flow and overland flow models. The four flood quantity indicators with different weights are namely percentage of inundation area (Ai), percentage of area activity on the inundation area (Aac), inundation duration (D), and inundation depth (H) which have consecutive indexes 0.3, 0.2, 0.2 and 0.3. The initial discharge was analyzed based on unit hydrograph at the upstream river cross-section of the inundation region. The study's results by verification of field observations showed that the highest peak inundation was 3.0 m in Cilember, inundation duration was a maximum of 18 hours in Citarik and Cilember, the highest inundation area was 329.23 % of the watershed area of Cilember. Results of calculations with the formulations, the highest quantity is 16.18 in Cilember flood that occurs in Melong village with a risk scale of 5. These results conclude that the Cilember flood is high-level damage so that it is a priority to be overcome.

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“…It has been suggested that a study be conducted to integrate spatial planning processes through multidisciplinary institutions and cross-border administration (Asdak, Supian, & Subiyanto, 2018). Furthermore, there is a need for watershed management to balance water availability and needs, land cover and groundwater, and quality of surface water and groundwater (Safarina, Karnisah, Permana, & Sufianto, 2019). It is also possible to reduce local floods through natural and/or artificial water infiltration methods.…”

Section: Introductionmentioning

confidence: 99%

Green Open Space and Barren Land Mapping for Flood Mitigation in Jakarta, the Capital of Indonesia

Dammayatri,

Susantoro,

Wikantika

2023

IJG

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High levels of rainfall, tidal flooding, land subsidence, intensified urban development, scarce barren land and a shortage of green open spaces (GOS) are contributing factors to the persistent flooding in Jakarta. Therefore, this study was conducted to map the GOS, built-up, and barren land in the city in order to calculate the biopore infiltration hole (LRB) potential for water infiltration as part of Jakarta's flood mitigation efforts using the Landsat 8 operational land imager (OLI). The Landsat data acquired on September 11, 2019, with path/row 122/064 were processed using the Fast Line-of-Sight Atmospheric Analysis of Spectral Hypercubes (FLAASH) method for the radiometric correction, and geometric correction with a root mean square error (RMSE) of 7.57 meters. Moreover, the normalized difference vegetation index (NDVI) was applied to classify the GOS, the normalized difference built-up index (NDBI) for the built-up areas, and the normalized difference barren land index (NDBaI) for barren land areas which were further confirmed using NDBI to distinguish them from the built-up areas. It is also important to note that the LRB potential was calculated by adding the GOS and barren land, dividing the result by the ideal land area multiplied by the ideal number of holes. The results showed that the GOS, built-up area, and barren land were 8.34%, 85.29%, and 2.48%, respectively. Furthermore, the LRB potential through the optimization of GOS and barren land was found to be 70.06 km2 and produced 16,816,248 LRB (18.27% of total needed). The realization of this value is expected to reduce the potential inundation in Jakarta by 15.6%.

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Green Cimahi watershed for balancing water supply and flood control

Cited by 4 publications

References 6 publications

Application of Watershed Carrying Capacity and Sustainability Index (Case Study: Cimahi Sub-Watershed)

Application of Watershed Carrying Capacity and Sustainability Index (Case Study: Cimahi Sub-Watershed)

Flood Quantification Index Based on Inundation Indicators and Risk Scale

Green Open Space and Barren Land Mapping for Flood Mitigation in Jakarta, the Capital of Indonesia

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