Assessment of soil erosion in social forest-dominated watersheds in Lampung, Indonesia

Yustika, Rahmah Dewi; Somura, Hiroaki; Yuwono, Slamet Budi; Arifin, Bustanul; Ismono, Hanung; Masunaga, Tsugiyuki

doi:10.1007/s10661-019-7890-5

Cited by 16 publications

(8 citation statements)

References 44 publications

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“…According to several researchers [90][91][92][93][94], there have been very drastic shifts in land use in West Lampung, Sumatra, Indonesia over the last ten years (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010). Primary forests have declined significantly, while dryland agriculture (coffee-based farming), rice fields, and residential areas have grown.…”

Section: Land Suitabilitymentioning

confidence: 99%

Tropical Volcanic Residual Soil

Iqbal¹,

Muslim²,

Zakaria³

et al. 2022

Progress in Volcanology

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In West Lampung, Sumatra, Indonesia, tropical volcanic residual soils are formed from weathering of volcanic breccias in hydrothermal alteration areas with a thickness of up to 20 m. This soil has the characteristics of clayey silt, low to high plasticity, brownish-red color, has the potential to swelling, easily eroded, and slide when it is saturated, and contains the minerals kaolinite, halloysite, illite, dickite, nacrite, montmorillonite, despujolsite, hematite, and magnetite. The results showed that this soil can cause corrosion of steel and is widely used by the community as a medium for growing plants and vegetables and as a foundation for infrastructure (for example, houses). The volcanic residual soil of the research area had Low Rare Earth Element (LREE) potential and specific uses. The soil with characteristic low plasticity has Liquid Limit (LL) brine value <50% will be suitable for agriculture purposes, building foundations, and earth construction. At the same time, the other category is soil with intermediate to high plasticity characteristics, which has an Liquid Limit (LL) brine value >50%, was more ideal for the primary forest.

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Section: Land Suitabilitymentioning

confidence: 99%

Tropical Volcanic Residual Soil

Iqbal¹,

Muslim²,

Zakaria³

et al. 2022

Progress in Volcanology

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“…Factor P represents the impact of soil conservation practices on soil erosion [31]. In this study, C and P are expressed as one unit considering the variability of land cover classes in the area, and if soil conservation practices were not implemented, the values of P were considered as 1 [32]. To generate the vegetation coverage map of Rongga Sub-district, image interpretation using QGIS 3.10.0 software through a training sample collection and the supervised classification technique were used.…”

Section: Soil Erosion Hazard Assessmentmentioning

confidence: 99%

Analysis of the Structure and Ecological Function of an Extreme Landscape in a Tropical Region of West Java, Indonesia

Withaningsih

Parikesit

Malik

et al. 2022

Forests

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An extreme landscape is a spatially heterogeneous area with unusual topography that is prone to natural disasters but still exhibits interrelated structures and functions. One of the important functions of an extreme landscape is its ecological function. This study aimed to determine the structure and reveal the ecological functions of an extreme landscape in a tropical region of West Java, with special reference to Rongga Sub-district. The method used was a combination of remote sensing techniques and geographic information systems, which were required to process, analyze, and interpret Landsat 8 OLI/TIRS data. The landscape structure was quantified by landscape metrics, after which an analysis of ecological functions was carried out based on the constituent elements of the landscape. The results showed that the landscape structure of Rongga Sub-district consists of various elements of agroforestry land, open fields, settlements, shrubs, plantations, and rainfed and irrigated rice fields. Additionally, secondary forest land acted as a landscape matrix where rivers crossed as natural corridors. The amount of each element varied; agroforestry land had the highest value, indicating that this element showed a high degree of human intervention. Each patch was adjacent to other patch types, and the landscape diversity was quite high. The extreme topography of Rongga Sub-district supports the landscape connectivity and consequently the presence of wild animals in this area. Therefore, Rongga Sub-district has an essential ecological function as a refuge for protected animals living in non-conservation areas.

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“…Traditional cultivation methods have little effect on erosion because of the quick recolonization of vegetation. Nevertheless, land-use changes toward intensive agriculture could require a higher adoption of conservation practices in order to mitigate erosion [54] and preserve the water quality [3,55]. The natural flow and ecological environment is negatively affected by the increase of irrigated agriculture alongside along urban expansion.…”

Section: Influence Of Land-use Update For Flow and Sediment Simulationmentioning

confidence: 99%

The Impacts of Land-Use Input Conditions on Flow and Sediment Discharge in the Dakbla Watershed, Central Highlands of Vietnam

Tram

Somura

Moroizumi

2021

Water

Self Cite

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The main objective of this study was to evaluate various land-use input conditions in terms of the performance improvement found in consequent flow and sediment simulations. The soil and water assessment tool (SWAT) was applied to the Dakbla watershed from 2000 to 2018. After the calibration and validation processes, dissimilar effects between the input conditions on the flow and sediment simulations were confirmed. It was recognized that the impact of the land use on the sediment simulation was more sensitive than with the flow simulation. Additionally, through monthly evaluation, the effects against the flow and sediment in the rainy season were larger than those in the dry season, especially for sediment simulation in the last three months from October to December. Changing land-use conditions could improve flow and sediment simulation performance better than the performance found with static land-use conditions. Updated land-use inputs should be considered in simulations if the given land-use condition changes in a relatively short period because of frequent land-use policy changes by a local government.

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Assessment of soil erosion in social forest-dominated watersheds in Lampung, Indonesia

Cited by 16 publications

References 44 publications

Tropical Volcanic Residual Soil

Tropical Volcanic Residual Soil

Analysis of the Structure and Ecological Function of an Extreme Landscape in a Tropical Region of West Java, Indonesia

The Impacts of Land-Use Input Conditions on Flow and Sediment Discharge in the Dakbla Watershed, Central Highlands of Vietnam

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