The effect of land use changes to discharge extremities in Cimahi Watershed – Upper Citarum Watershed, West Java

Nurhayati, Siti Ai; Sabar, Arwin; Marselina, Mariana

doi:10.1051/e3sconf/202014807002

Cited by 3 publications

(4 citation statements)

References 12 publications

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“…Shifts in local rainfall patterns between sub-watersheds make it difficult to disentangle the relative importance of land use and climate change through statistical pattern analysis without knowledge of the underlying processes [98,99]. The holy grail of scientific hydrology, connecting overall aggregated flow patterns to local extreme events and possible hysteresis, is still worth searching for even if a general solution might ultimately prove impossible to find [100].…”

Section: Discussionmentioning

confidence: 99%

Infiltration-Friendly Agroforestry Land Uses on Volcanic Slopes in the Rejoso Watershed, East Java, Indonesia

Suprayogo

Noordwijk

Hairiah

et al. 2020

Land

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Forest conversion to agriculture can induce the loss of hydrologic functions linked to infiltration. Infiltration-friendly agroforestry land uses minimize this loss. Our assessment of forest-derived land uses in the Rejoso Watershed on the slopes of the Bromo volcano in East Java (Indonesia) focused on two zones, upstream (above 800 m a.s.l.; Andisols) and midstream (400–800 m a.s.l.; Inceptisols) of the Rejoso River, feeding aquifers that support lowland rice areas and drinking water supply to nearby cities. We quantified throughfall, infiltration, and erosion in three replications per land use category, with 6–13% of rainfall with intensities of 51–100 mm day−1. Throughfall varied from 65 to 100%, with a zone-dependent intercept but common 3% increase in canopy retention per 10% increase in canopy cover. In the upstream watershed, a tree canopy cover > 55% was associated with the infiltration rates needed, as soil erosion per unit overland flow was high. Midstream, only a tree canopy cover of > 80% qualified as “infiltration-friendly” land use, due to higher rainfall in this zone, but erosion rates were relatively low for a tree canopy cover in the range of 20–80%. The tree canopy characteristics required for infiltration-friendly land use clearly vary over short distances with soil type and rainfall intensity.

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Section: Discussionmentioning

confidence: 99%

Infiltration-Friendly Agroforestry Land Uses on Volcanic Slopes in the Rejoso Watershed, East Java, Indonesia

Suprayogo

Noordwijk

Hairiah

et al. 2020

Land

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“…Population growth in Cimahi City causes land use changes. Land that was originally green or unused is then used for the purposes of the domestic, agricultural, and industrial sectors [4]. These three sectors are the main activities carried out in the Cimahi sub-watershed which have the potential to be the main source of river pollution.…”

Section: Resultsmentioning

confidence: 99%

“…Other problem is the increase in population. It is one of the factors that causes land use changes in the Citarum watershed especially in the case of Cimahi sub-watershed [4].…”

Section: Introductionmentioning

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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“…The lack of an adequate sewage treatment system for domestic wastewater causes heavy flows of nitrogen, PO 4 , and chemical oxygen demand (COD) into the Citarum River [19]. In addition, the increased settlement in the upper Citarum Watershed has had an effect on the dissolved oxygen (DO) decline [20].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Changes in Water Quality Based on Climate and Hydrology Effects in the Cirata Reservoir

Wiranegara,

Sunardi,

Sumiarsa

et al. 2023

Water

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This research aimed to identify water quality changes in the Cirata Reservoir and the factors affecting them in terms of hydrology and climate. The sampling was carried out in both the rainy and dry seasons at 12 locations in the Cirata Reservoir. The Mann–Whitney U-test (different test) results showed that salinity, total suspended solids (TSS), the potential of hydrogen (pH), nitrate (NO3-N), phosphate (PO4), nitrate and phosphate content in the sediment were significantly different (α < 0.05) between the rainy and dry seasons. The principal component analysis (PCA) results showed that the water quality characteristics in the Cirata Reservoir in the dry season were influenced by environmental conditions in the reservoir, especially by the floating cage aquaculture and climate conditions. The high solar radiation, low rainfall, and floating cage aquaculture increased the pH and amounts of dissolved oxygen (DO), ammonia (NH3-N), PO4, nitrate and phosphate in the sediment while decreasing transparency, salinity, TSS, and NH3-N. During the rainy season, the high runoff from Citarum Watershed controlled the water quality characteristics of the Cirata Reservoir. In this season, transparency, salinity, pH, DO, NH3-N, PO4, nitrate and phosphate in the sediment increased, while TSS tended to be low. In general, the water volume addition decreased the nutrition and salinity concentration in the water body. However, a distinct phenomenon occurred in the Cirata Reservoir. The runoff from agriculture, settlement, livestock, and the Citatah Karst in the Upper Citarum Watershed increased nutrition and salinity in the reservoir. Land use in the Citarum Watershed and floating cage aquaculture had an important role in the reservoir water quality.

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The effect of land use changes to discharge extremities in Cimahi Watershed – Upper Citarum Watershed, West Java

Cited by 3 publications

References 12 publications

Infiltration-Friendly Agroforestry Land Uses on Volcanic Slopes in the Rejoso Watershed, East Java, Indonesia

Infiltration-Friendly Agroforestry Land Uses on Volcanic Slopes in the Rejoso Watershed, East Java, Indonesia

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

Characteristics and Changes in Water Quality Based on Climate and Hydrology Effects in the Cirata Reservoir

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