STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK)
In the last two decade, there has been a dramatically land use changes in the sub-catchment area of Jangkok, Lombok, from forest toward agroforestry. The results of study show that 17.32% of upper stream of Sub-Jangkok due to land use changes from 1995 to 2010 has not been degraded or still good qua...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Brawijaya
2013-04-01
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| Series: | Jurnal Teknik Pengairan |
| Online Access: | https://jurnalpengairan.ub.ac.id/index.php/jtp/article/view/139 |
| _version_ | 1828785820494987264 |
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| author | Ery Suhartanto Dwi Priyantoro Itratip Itratip |
| author_facet | Ery Suhartanto Dwi Priyantoro Itratip Itratip |
| author_sort | Ery Suhartanto |
| collection | DOAJ |
| description | In the last two decade, there has been a dramatically land use changes in the sub-catchment area of Jangkok, Lombok, from forest toward agroforestry. The results of study show that 17.32% of upper stream of Sub-Jangkok due to land use changes from 1995 to 2010 has not been degraded or still good quality catchment indicated by the following variables: coefifient C = 0.16 and potential soil erosion of 6.0 t ha-1 year-1. The C = 0.16 means that the was only 16 % of rainfall undergo run off and the rest of 84% goes to infiltration to enrich ground water. According to the natural erosion in the region which is about 5.75 t/ha/ year, the erosion index was 0.59 or less than 1 classified as low incident. Overall, the land use changes in upper stream of sub-catchment of Jangkok was not significantly correlated to the river-water recharge fluctuation. This was confirmed by the RRC (1.67) and MD (0.21 m3/sec) resulted from 1992-1996. In the next seven years (1997-2003) the RRC and MD were 2.47 and 0.35 m3/sec respectively. In 2004-2010, the RRC and MD were 2.0 and 0.25 m3/sec. However, there were slightly decline of river-water recharge (0.03 m3/sec/year) as well as rainfall (14.64 mm/year) and daily rainfall much as 10 days within the last 10 years.
Keywords: land use changes, catchment, runoff, erosion, water recharge. |
| first_indexed | 2024-12-11T23:59:16Z |
| format | Article |
| id | doaj.art-57b808e01521404984ce5707f050941e |
| institution | Directory Open Access Journal |
| issn | 2086-1761 2477-6068 |
| language | English |
| last_indexed | 2024-12-11T23:59:16Z |
| publishDate | 2013-04-01 |
| publisher | Universitas Brawijaya |
| record_format | Article |
| series | Jurnal Teknik Pengairan |
| spelling | doaj.art-57b808e01521404984ce5707f050941e2022-12-22T00:45:16ZengUniversitas BrawijayaJurnal Teknik Pengairan2086-17612477-60682013-04-01311547STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK)Ery Suhartanto0Dwi Priyantoro1Itratip Itratip2Fakultas Teknik Teknik Pengairan Universitas BrawijayaFakultas Teknik Teknik Pengairan Universitas BrawijayaMahasiswa Program Magister Teknik Pengairan Universitas BrawijayaIn the last two decade, there has been a dramatically land use changes in the sub-catchment area of Jangkok, Lombok, from forest toward agroforestry. The results of study show that 17.32% of upper stream of Sub-Jangkok due to land use changes from 1995 to 2010 has not been degraded or still good quality catchment indicated by the following variables: coefifient C = 0.16 and potential soil erosion of 6.0 t ha-1 year-1. The C = 0.16 means that the was only 16 % of rainfall undergo run off and the rest of 84% goes to infiltration to enrich ground water. According to the natural erosion in the region which is about 5.75 t/ha/ year, the erosion index was 0.59 or less than 1 classified as low incident. Overall, the land use changes in upper stream of sub-catchment of Jangkok was not significantly correlated to the river-water recharge fluctuation. This was confirmed by the RRC (1.67) and MD (0.21 m3/sec) resulted from 1992-1996. In the next seven years (1997-2003) the RRC and MD were 2.47 and 0.35 m3/sec respectively. In 2004-2010, the RRC and MD were 2.0 and 0.25 m3/sec. However, there were slightly decline of river-water recharge (0.03 m3/sec/year) as well as rainfall (14.64 mm/year) and daily rainfall much as 10 days within the last 10 years. Keywords: land use changes, catchment, runoff, erosion, water recharge.https://jurnalpengairan.ub.ac.id/index.php/jtp/article/view/139 |
| spellingShingle | Ery Suhartanto Dwi Priyantoro Itratip Itratip STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK) Jurnal Teknik Pengairan |
| title | STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK) |
| title_full | STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK) |
| title_fullStr | STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK) |
| title_full_unstemmed | STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK) |
| title_short | STUDI PENILAIAN KONDISI DAS DAN IMPLIKASINYA TERHADAP FLUKTUASI DEBIT SUNGAI (STUDI KASUS PADA SUB DAS JANGKOK PULAU LOMBOK) |
| title_sort | studi penilaian kondisi das dan implikasinya terhadap fluktuasi debit sungai studi kasus pada sub das jangkok pulau lombok |
| url | https://jurnalpengairan.ub.ac.id/index.php/jtp/article/view/139 |
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