KAJIAN PERUBAHAN GUNA LAHAN DAN LIMPASAN AIR PERMUKAAN, SERTA IMPLIKASINYA TERHADAP KEBIJAKAN TATA RUANG (STUDI KASUS: SUB â DAS CIRASEA, KABUPATEN BANDUNG)
In addition to factors relating to soil infilteration capacity and changes in rainfall, land use change in environmentally sensitive upstream regions of watersheds have been known to significantly influence surface runoff. An increase in surface runoff increases flood occurrence and intensity. Fl...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/46296 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | In addition to factors relating to soil infilteration capacity and changes in rainfall,
land use change in environmentally sensitive upstream regions of watersheds have
been known to significantly influence surface runoff. An increase in surface runoff
increases flood occurrence and intensity. Flooding negatively impacts the
socioeconomic condition of those impacted directly by it. Therefore, this study will
attempt to connect spatial land use change patterns and changes to surface runoff
patterns between 1998 and 2018, in addition to land use policy implications. Data for
this study were collected from relevant government institutions. Spatial analytics were
used to analyze land ue change patterns, whereas changes in surface runoff were
identified using the SCS – CN (curve number) method. This study found an increase in
runoff levels within the Cirasea subwatershed, increasing from 48.49mm (1999) to
51.81mm (2018). This increase in surface runoff was found to be the result of land use
change in the form of deforestation; whereby a change in land use from forest land
into agricultural uses were idenfitifed. According to the 2016 – 2036 Regional Land
Use Plan (Kabupaten Bandung), areas where deforestation driven land use change
were identified, are largely in areas zoned for conservation purposes in the form of
protected forest land. Therefore, it can be concluded that increases in surface runoff
as happened in the Cirasea subwatershed to be caused by land use violations
upstream. It is therefore necessary to return formerly forested land into forested land.
Agroforestry is a known viable alternative that could be recommended in order to
return agricultural land back to its previously forested state. By applying agroforestry,
agricultural activities could continue, while maintaining ecological functions related
to forested lands, including runoff control. |
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