A meteorological drought refers to reduced rainfall conditions and is a great challenge to food s... more A meteorological drought refers to reduced rainfall conditions and is a great challenge to food security. Information of a meteorological drought in advance is important for taking actions in anticipation of its effects, but this can be difficult for areas with limited or sparse ground observation data available. In this study, a meteorological drought indicator was approached by applying the Standardized Precipitation Index (SPI) to satellite-based precipitation products from multiple sources. The SPI based meteorological drought analysis was then applied to Java Island, in particular to the largest rice-producing districts of Indonesia. A comparison with ground observation data showed that the satellite products accurately described meteorological drought events in Java both spatially and temporally. Meteorological droughts of the eight largest rice-producing districts in Java were modulated by the natural variations in El Niño and a positive-phase Indian Ocean Dipole (IOD). The d...
IOP Conference Series: Earth and Environmental Science, 2021
A sustainable human settlement and the environment are one of the SDGs 2030 programs to realize S... more A sustainable human settlement and the environment are one of the SDGs 2030 programs to realize Sustainable Cities and Communities, which also one of Purwokerto municipality’s planning goals. Purwokerto is in the progress of the KOTAKU (City Without Slum) program to ensure a sustainable settlement for all. To help the program in the future, sustainable evaluation of the present settlement area based on physical, social, and economic parameters is required. The physical parameter was assessed using a combination of field observations and analysis of remote sensing images (Sentinel 2-A and Worldview). In contrast, the social and economic parameters were evaluated using secondary datasets and interviews. The urban settlement sustainability was determined by the scoring method using geographic information systems and spatial analysis. This study showed that 22.22% of the current total urban settlement area in Purwokerto had a good level of sustainability, while the rest, 48.15% and 29.6...
IOP Conference Series: Earth and Environmental Science, 2020
Water is an important natural resource in supporting the lives of all living things. The increasi... more Water is an important natural resource in supporting the lives of all living things. The increasing population in Majalengka District adding a large amount of water usage. The extraction of groundwater that has been carried out over time has also increased, thus, a study is needed to reveal groundwater recharge zone so that we can predict the groundwater reserves in a certain area. Therefore, a study entitled Potential Groundwater Recharge Zone in CAT Majalengka needs to be conducted because CAT is a location where rainwater falls and can also be used as data to estimate the groundwater reserves in a certain area. The method used in this study was SMCE (Spatial Multi-Criteria Evaluation) by using a quality point system on each variable used. The variables used in this study were lithology, rainfall, slope, altitude, land use, soil texture, and flow density. The results of this study showed that the potential groundwater recharge zones in CAT Majalengka were dominated by high and ver...
IOP Conference Series: Earth and Environmental Science, 2021
Erosion that exceeds the normal threshold can cause damage to the environment. The reduction of t... more Erosion that exceeds the normal threshold can cause damage to the environment. The reduction of the physical properties of soil is a result of erosion. The USLE method is an empirical model that can predict the amount of erosion. The purpose of this study was to determine the level of erosion hazard that occurs in the Tanralili sub-watershed. The benefit of this study is to find out areas that are experiencing severe erosion so that a recovery plan can be made for eroded soils to prevent even more significant decay Erosion calculated using the USLE (Universal Soil Loss Equation) model. There are several variables used in the calculation, which are the rainfall erosivity factor, the soil erodibility factor, the topographic factor, and the cropping management factor in looking at vegetation cover in the field using a survey method. The analysis used in this study is descriptive and spatial. Very high erosion occurs in almost all of the Tanraliili sub-watershed, about > 480 tons/ha/...
IOP Conference Series: Earth and Environmental Science, 2021
Majalengka is one of districts in Indonesia which is susceptible to landslides. Landslides in Maj... more Majalengka is one of districts in Indonesia which is susceptible to landslides. Landslides in Majalengka caused enormous losses such as damage to infrastructure, loss of property, and even human fatalities. Seeing of the impact, mitigation efforts are needed to reduce risks and losses by making landslide susceptibility maps. This study aims to map areas landslide susceptibility and as a reference for the government and related agencies to reduce losses. The method used overlay using Spatial Multi-Criteria Evaluation (SMCE), using weighting values from the Minister Public Works Regulation NO.22/PRT/M/2007, Puslittanak Bogor (2014) and Directorate Volcanology and Disaster Mitigation (DVMBG) (2004). Then comparison of these sources is carried out to determine weighting value with the highest accuracy. The variables are slope, rainfall, soil type, lithology, and land use. The results of this study indicate that landslide susceptibility areas are divided into non-susceptible, low, modera...
IOP Conference Series: Earth and Environmental Science, 2020
Erosion is one of the geomorphological processes that play a role in the development of landforms... more Erosion is one of the geomorphological processes that play a role in the development of landforms. Erosion events are controlled by exogenous energy through geomorphological agents. The rate of soil erosion in each ecosystem differs depending on how strong the erosion factor affects the soil conditions. Erosion rates will be very dangerous if erosion occurs in large erosion and in large areas. This will result in disruption of human activities and harm to society. Therefore, the importance of knowing the rate of eroded land and its variables so that this can be used in developing development and so as not to cause harm to the community. The purpose of this study was to map the area of soil erosion that occurred in Ci Lutung watershed and how big the erosion was and to find out how effective soil conservation was carried out on erosion occurring. In this study using the RUSLE (Revised Universal Soil Loss Equation) method as an equation to determine the amount of erosion and the incid...
Many countries in the world have various kinds of problems, such as disasters. Indonesia is one o... more Many countries in the world have various kinds of problems, such as disasters. Indonesia is one of the countries with high area and population affected by landslides, such as in several regions in Indonesia, namely Bogor Districts. The affected population can be caused by the increasing number of residents and built-up areas, as well as the low level of public knowledge about landslides. The high population affected can describe the level of vulnerability and capacity that exists in the community, such as in South Babakan Madang Subdistrict. The density of the population and the built-up area which includes settlements, public facilities and community knowledge related to landslides that are different in 3 Countryside namely Bojong Koneng, Cijayanti, and Karang Tengah make the people in South Babakan Madang Subdistrict vulnerable to landslides. The modified scoring method with reference to Perka BNPB No. 02 of 2012 can be used to determine the level of vulnerability and capacity of ...
IOP Conference Series: Earth and Environmental Science, 2019
Gerokgak, Seririt, Banjar, and Buleleng coastal areas are located in the west of Buleleng Regency... more Gerokgak, Seririt, Banjar, and Buleleng coastal areas are located in the west of Buleleng Regency, Bali. These area are prone to abrasion and accretion. Abrasion and accresion is a natural phenomenon that’s runs balanced. Human factor caused this phenomenon were change the balanced, it causes harm to humans. The purpose of the research were to analyze influece of abrasion and accresion toward land use wide at coastal area. The research used Landsat 5, 7, and 8 images with 3 periods which were 1990 and 1997, 1997 and 2007, and the last period was 2007 and 2017. The data were processed by calculate long, width, and wide of coastline change inter period. It were relate with wide’s land use change at coastal area. The result showed that abrasion and accresion were happen along the coastal areas in research area. The worst abrasion were located in Gerokgak Subdistrict with extensive 217.109 m2 One of it’s impact are some ponds and buildings around the Segara temple at Gerokgak Village’s ...
Hydrological models often require input data on soil-water retention (SWR), but obtaining such da... more Hydrological models often require input data on soil-water retention (SWR), but obtaining such data is laborious and costly so that SWR in many places remains unknown. To fill the gap, a prediction of SWR using a pedotransfer function (PTF) is one of the alternatives. This study aims to select the most suitable existing PTFs in order to predict SWR for the case of the upper Bengawan Solo (UBS) catchment on Java, Indonesia. Ten point PTFs and two continuous PTFs, which were developed from tropical soils elsewhere, have been applied directly and recalibrated based on a small soil sample set in UBS. Scatter plots and statistical indices of mean error (ME), root mean square error (RMSE), model efficiency (EF) and Pearson’s correlation (r) showed that recalibration using the Shuffled Complex Evolution-University of Arizona (SCE-UA) algorithm can help to improve the prediction of PTFs significantly compared to direct application of PTFs. This study is the first showing that improving SWR-...
A meteorological drought refers to reduced rainfall conditions and is a great challenge to food s... more A meteorological drought refers to reduced rainfall conditions and is a great challenge to food security. Information of a meteorological drought in advance is important for taking actions in anticipation of its effects, but this can be difficult for areas with limited or sparse ground observation data available. In this study, a meteorological drought indicator was approached by applying the Standardized Precipitation Index (SPI) to satellite-based precipitation products from multiple sources. The SPI based meteorological drought analysis was then applied to Java Island, in particular to the largest rice-producing districts of Indonesia. A comparison with ground observation data showed that the satellite products accurately described meteorological drought events in Java both spatially and temporally. Meteorological droughts of the eight largest rice-producing districts in Java were modulated by the natural variations in El Niño and a positive-phase Indian Ocean Dipole (IOD). The d...
IOP Conference Series: Earth and Environmental Science, 2021
A sustainable human settlement and the environment are one of the SDGs 2030 programs to realize S... more A sustainable human settlement and the environment are one of the SDGs 2030 programs to realize Sustainable Cities and Communities, which also one of Purwokerto municipality’s planning goals. Purwokerto is in the progress of the KOTAKU (City Without Slum) program to ensure a sustainable settlement for all. To help the program in the future, sustainable evaluation of the present settlement area based on physical, social, and economic parameters is required. The physical parameter was assessed using a combination of field observations and analysis of remote sensing images (Sentinel 2-A and Worldview). In contrast, the social and economic parameters were evaluated using secondary datasets and interviews. The urban settlement sustainability was determined by the scoring method using geographic information systems and spatial analysis. This study showed that 22.22% of the current total urban settlement area in Purwokerto had a good level of sustainability, while the rest, 48.15% and 29.6...
IOP Conference Series: Earth and Environmental Science, 2020
Water is an important natural resource in supporting the lives of all living things. The increasi... more Water is an important natural resource in supporting the lives of all living things. The increasing population in Majalengka District adding a large amount of water usage. The extraction of groundwater that has been carried out over time has also increased, thus, a study is needed to reveal groundwater recharge zone so that we can predict the groundwater reserves in a certain area. Therefore, a study entitled Potential Groundwater Recharge Zone in CAT Majalengka needs to be conducted because CAT is a location where rainwater falls and can also be used as data to estimate the groundwater reserves in a certain area. The method used in this study was SMCE (Spatial Multi-Criteria Evaluation) by using a quality point system on each variable used. The variables used in this study were lithology, rainfall, slope, altitude, land use, soil texture, and flow density. The results of this study showed that the potential groundwater recharge zones in CAT Majalengka were dominated by high and ver...
IOP Conference Series: Earth and Environmental Science, 2021
Erosion that exceeds the normal threshold can cause damage to the environment. The reduction of t... more Erosion that exceeds the normal threshold can cause damage to the environment. The reduction of the physical properties of soil is a result of erosion. The USLE method is an empirical model that can predict the amount of erosion. The purpose of this study was to determine the level of erosion hazard that occurs in the Tanralili sub-watershed. The benefit of this study is to find out areas that are experiencing severe erosion so that a recovery plan can be made for eroded soils to prevent even more significant decay Erosion calculated using the USLE (Universal Soil Loss Equation) model. There are several variables used in the calculation, which are the rainfall erosivity factor, the soil erodibility factor, the topographic factor, and the cropping management factor in looking at vegetation cover in the field using a survey method. The analysis used in this study is descriptive and spatial. Very high erosion occurs in almost all of the Tanraliili sub-watershed, about > 480 tons/ha/...
IOP Conference Series: Earth and Environmental Science, 2021
Majalengka is one of districts in Indonesia which is susceptible to landslides. Landslides in Maj... more Majalengka is one of districts in Indonesia which is susceptible to landslides. Landslides in Majalengka caused enormous losses such as damage to infrastructure, loss of property, and even human fatalities. Seeing of the impact, mitigation efforts are needed to reduce risks and losses by making landslide susceptibility maps. This study aims to map areas landslide susceptibility and as a reference for the government and related agencies to reduce losses. The method used overlay using Spatial Multi-Criteria Evaluation (SMCE), using weighting values from the Minister Public Works Regulation NO.22/PRT/M/2007, Puslittanak Bogor (2014) and Directorate Volcanology and Disaster Mitigation (DVMBG) (2004). Then comparison of these sources is carried out to determine weighting value with the highest accuracy. The variables are slope, rainfall, soil type, lithology, and land use. The results of this study indicate that landslide susceptibility areas are divided into non-susceptible, low, modera...
IOP Conference Series: Earth and Environmental Science, 2020
Erosion is one of the geomorphological processes that play a role in the development of landforms... more Erosion is one of the geomorphological processes that play a role in the development of landforms. Erosion events are controlled by exogenous energy through geomorphological agents. The rate of soil erosion in each ecosystem differs depending on how strong the erosion factor affects the soil conditions. Erosion rates will be very dangerous if erosion occurs in large erosion and in large areas. This will result in disruption of human activities and harm to society. Therefore, the importance of knowing the rate of eroded land and its variables so that this can be used in developing development and so as not to cause harm to the community. The purpose of this study was to map the area of soil erosion that occurred in Ci Lutung watershed and how big the erosion was and to find out how effective soil conservation was carried out on erosion occurring. In this study using the RUSLE (Revised Universal Soil Loss Equation) method as an equation to determine the amount of erosion and the incid...
Many countries in the world have various kinds of problems, such as disasters. Indonesia is one o... more Many countries in the world have various kinds of problems, such as disasters. Indonesia is one of the countries with high area and population affected by landslides, such as in several regions in Indonesia, namely Bogor Districts. The affected population can be caused by the increasing number of residents and built-up areas, as well as the low level of public knowledge about landslides. The high population affected can describe the level of vulnerability and capacity that exists in the community, such as in South Babakan Madang Subdistrict. The density of the population and the built-up area which includes settlements, public facilities and community knowledge related to landslides that are different in 3 Countryside namely Bojong Koneng, Cijayanti, and Karang Tengah make the people in South Babakan Madang Subdistrict vulnerable to landslides. The modified scoring method with reference to Perka BNPB No. 02 of 2012 can be used to determine the level of vulnerability and capacity of ...
IOP Conference Series: Earth and Environmental Science, 2019
Gerokgak, Seririt, Banjar, and Buleleng coastal areas are located in the west of Buleleng Regency... more Gerokgak, Seririt, Banjar, and Buleleng coastal areas are located in the west of Buleleng Regency, Bali. These area are prone to abrasion and accretion. Abrasion and accresion is a natural phenomenon that’s runs balanced. Human factor caused this phenomenon were change the balanced, it causes harm to humans. The purpose of the research were to analyze influece of abrasion and accresion toward land use wide at coastal area. The research used Landsat 5, 7, and 8 images with 3 periods which were 1990 and 1997, 1997 and 2007, and the last period was 2007 and 2017. The data were processed by calculate long, width, and wide of coastline change inter period. It were relate with wide’s land use change at coastal area. The result showed that abrasion and accresion were happen along the coastal areas in research area. The worst abrasion were located in Gerokgak Subdistrict with extensive 217.109 m2 One of it’s impact are some ponds and buildings around the Segara temple at Gerokgak Village’s ...
Hydrological models often require input data on soil-water retention (SWR), but obtaining such da... more Hydrological models often require input data on soil-water retention (SWR), but obtaining such data is laborious and costly so that SWR in many places remains unknown. To fill the gap, a prediction of SWR using a pedotransfer function (PTF) is one of the alternatives. This study aims to select the most suitable existing PTFs in order to predict SWR for the case of the upper Bengawan Solo (UBS) catchment on Java, Indonesia. Ten point PTFs and two continuous PTFs, which were developed from tropical soils elsewhere, have been applied directly and recalibrated based on a small soil sample set in UBS. Scatter plots and statistical indices of mean error (ME), root mean square error (RMSE), model efficiency (EF) and Pearson’s correlation (r) showed that recalibration using the Shuffled Complex Evolution-University of Arizona (SCE-UA) algorithm can help to improve the prediction of PTFs significantly compared to direct application of PTFs. This study is the first showing that improving SWR-...
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