FAKTOR YANG BERPENGARUH TERHADAP TINGKAT KERAPATAN EROSI PARIT DI DAERAH ALIRAN SUNGAI KALIWUNGU (Factor influencing density level of gully erosion in Kaliwungu Watershed)

Jurnal Penelitian Pengelolaan Daerah Aliran Sungai

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Title FAKTOR YANG BERPENGARUH TERHADAP TINGKAT KERAPATAN EROSI PARIT DI DAERAH ALIRAN SUNGAI KALIWUNGU (Factor influencing density level of gully erosion in Kaliwungu Watershed)
FACTOR INFLUENCING DENSITY LEVEL OF GULLY EROSION IN KALIWUNGU WATERSHED
 
Creator Nugraha, Surya Sabda
Sartohadi, Junun
 
Subject density of gully erosion; land use; landform
erosion, gully, density, landuse, landform
 
Description Distribution and density level of gullies reflect the level of land degradation on a catchment. This research aims to identify the distribution of gully and to calculate the density level of gully erosion in Kaliwungu Watershed. The distribution of gully was obtained through field survey, while the density level was analyzed based on landuse and landform maps. Gully distribution was overlayed on landuse and landform maps. Landuse was delineated by interpreting aerial photograph of Kaliwungu Watershed. Aerial imagery supported by the result of Sentinel image processing was used to observe vegetation density. Landform and slope were delineated from DEM. The gully small catchments were delineated by DEM and aerial photograph interpretation of Kaliwungu Watershed. Gully density is calculated by comparing erosion length and erosion volume to the small catchment extent. Descriptive analysis was used to determine the factors that influenced gully. The analysis was conducted based on the result of overlaying gully distribution on landuse and landform maps.The result of this research were a 1:10.000 map of gully distribution and density level of gully erosion in Kaliwungu Watershed. There were three density classes of gully in Kaliwungu Watershed which are high, medium, and low. The formation process of intensive gully only takes place at some intensively land cultivation points or at some land that has been highly disturbed by human activities. The result shows that landuse and land cultivation was the factors that influenced the formation of gully erosion.
Gully erosion is the most siginificant forms of land degradation. Gully distribution can indicate land degradation. Density level of gully shows the level of land degradation on a catchment. This research aims to identify the distribution of gully and to calculate density level of gully erosion in Kaliwungu Watershed. Distribution of gully and density level of gully was analyze based on land use map and landform map. In addition, analyze the characteristics of slopes, vegetation, infiltration, and land cultivation to determine the factors affecting gully erosion.The researchers was applying field survey to collect gully erosion data. Gully distribution was overlayed on land use map and landform map. Land use was delineated by interpretated aerial photograph of Kaliwungu Watershed. Aerial imagery with the support from the result of Sentinel image processing was used to observe vegetation density. Landform and slope were deliniated from Terra-SAR X DEM. Gully catchment was delineated by interpretated Terra-SAR X DEM and aerial photograph of Kaliwungu Watershed.  Analysis to determine the factors that influenced gully was done descriptively. The analysis was conducted based on the result of overlay of gully distribution on land use map and landform map. The result of this research were map of gully distribution and map of density level of gully erosion in Kaliwungu Watershed with a scale of 1: 10.000. Gully erosion formed on erosin zone to deposition zone, but there were 3 gully that formed on residual zone. There were three density classes of gully in Kaliwungu Watershed which are high, medium, and low. The process of intensive gully takes place only at the some point with intensive land cultivation or land that has been highly disturbed by human activities such as settlements. The study result shows that land use and land cultivation was the factor that influenced the formation of gully erosion.
 
Publisher Balai Penelitian dan Pengembangan Teknologi Pengelolaan DAS
 
Contributor

 
Date 2018-08-24
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://ejournal.forda-mof.org/ejournal-litbang/index.php/JPPDAS/oai./index.php/JPPDAS/article/view/4323
10.20886/jppdas.2018.2.1.73-88
 
Source Jurnal Penelitian Pengelolaan Daerah Aliran Sungai; Vol 2, No 1 (2018): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai; 73-88
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai; Vol 2, No 1 (2018): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai; 73-88
2579-5511
2579-6097
 
Language ind
 
Relation http://ejournal.forda-mof.org/ejournal-litbang/index.php/JPPDAS/oai./index.php/JPPDAS/article/view/4323/4284
 
Rights Copyright (c) 2018 Jurnal Penelitian Pengelolaan Daerah Aliran Sungai
http://creativecommons.org/licenses/by-nc-sa/4.0
 

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