Kurniawati, Tri (2018) Evaluasi dan Rasionalisasi Kerapatan Jaringan Pos Hujan dan Pos Duga Air dengan Metode Stepwise di Sub DAS Lesti. Sarjana thesis, Universitas Brawijaya.
Abstract
Kuantitas dan kualitas data hidrologi yang akurat dalam penentuan potensi air pada suatu Wilayah Sungai (WS) sangat diperlukan dalam rangka mengoptimalkan kebutuhan dan pengembangan sumber daya air pada wilayah sungai. Hal ini tidak terlepas dari pentingnya jaringan pos hidrologi yaitu, pos hujan dan pos duga air. Sub Daerah Aliran Sungai (DAS) Lesti mempunyai memiliki syarat kerapatan jaringan 100-250 km2/pos hujan menurut standar WMO. Dengan luas Sub DAS Lesti 382.837 km2 dan terdapat 6 pos hujan, hal tersebut terlalu berlebihan karena jika diperhatikan sebenarnya 2-4 pos hujan sudah cukup untuk mewakili daerah Sub DAS Lesti. Sehingga studi ini diperlukan untuk mengevaluasi dan merasionalisasi kerapatan jaringan pos hujan dan pos duga air di Sub DAS Lesti. Evaluasi kerapatan jaringan pos hujan dan pos duga air eksisting menggunakan standar WMO (World Meteorological Organization) dengan melihat syarat nilai kerapatannya yang telah direkomendasikan dan luas daerah pengaruh pos hujan dan pos duga air. Analisa hubungan kerapatan jaringan pos hujan dan pos duga air menggunakan metode stepwise. Awalnya data hujan dan data debit dilakukan pemilihan jenis data, uji konsistensi dan uji homogenitas terlebih dahulu untuk melihat kualitas datanya. Kemudian dianalisa dengan metode stepwise dan akan mendapatkan hasil model regresi terbaik dengan melihat nilai koefisien korelasinya. Kemudian hasil model regresi tersebut dianalisa regresi linear, uji F, uji t, analisa koefisien determinasi dan uji asumsi klasik (uji normalitas, multikolinearitas, heteroskedastisitas dan autokorelasi). Setelah itu didapatkan beberapa rekomendasi pos hujan berdasarkan proses analisa metode stepwise dan untuk mendapatkan hasil rekomendasi yang rasional dilihat dari 2 aspek yaitu uji statistika dan luas daerah pengaruh dari masing-masing pos hujan. Hasil evaluasi kerapatan jaringan pos hujan dan pos duga air dengan standar WMO, sudah rasional untuk pos duga air dimana terdapat 1 pos duga air di Sub DAS Lesti dengan luas 382.837 km2 yang syarat kerapatannya 300-1000 km2/pos duga air. Sedangkan untuk pos hujan walaupun terdapat 6 pos hujan dan telah memiliki kerapatan jaringan yang bagus artinya sangat memenuhi standar WMO dimana syarat kerapatannya 100-250 km2/pos hujan namun hal tersebut belum rasional karena penyebarannya belum cukup merata jika dilihat dari luas daerah pengaruh pada masing-masing pos hujan. Dan hasil analisa hubungan kerapatan jaringan pos hujan da pos duga air dengan metode stepwise didapatkan 5 rekomendasi. Rekomendasi jumlah pos hujan yang rasional adalah rekomendasi 1 dengan jumlah 2 pos hujan dan rekomendasi 2 dengan jumlah 3 pos hujan.
English Abstract
The accuracy of quantity and quality hydrology data for determining the potential of water in the river basin is necessary in order to optimize the needs and development of water resources in the river basin. This is related with the importance of hydrology station network especially rain gauge station and automatic water level recorder. Lesti Sub Watershed has a network density requirement 100-250 km2 / rain gauge station based on WMO’s standard. The area of Lesti Sub Watershed is 382,837 km2 and there are 6 rain gauge stations, it is too excessive because actually with 2-4 rain gauge stations are enough to represent Lesti Sub Watershed. So, this study is needed to evaluate and rationalize network density of rain gauge station and automatic water level recorder in Lesti Sub Watershed. Evaluation network density of existing rain gauge station and automatic water level recorder uses WMO (World Meteorological Organization)’s standard by looking at the recommended density value requirement and the influence area of rain gauge station and automatic water level recorder. Analysis relation of rain gauge station and automatic water level recorder uses stepwise method. First, rainfall data and debit data do data type selection, consistency test and homogeneity test to see the quality of data. Then, data can be analyzed in stepwise method and will get best regression model result by looking at correlation coefficient value. The regression model was analyzed by linear regression, F test, t test, determination coefficient analysis and classical assumption test (normality test, multicollinearity, heteroscedasticity and autocorrelation). Stepwise method will result some rain gauge station recommendations and rain gauge station recommendations that are rational are chosen by 2 aspects, they are statistic test and the influence area of each rain gauge station. The result in evaluation network density of rain gauge station and automatic water level recorder with WMO’s standard, it is rational for the automatic water level recorder where there is 1 automatic water level recorder in Lesti Sub Watershed with the area is 382,837 km2 and density requirement 300-1000 km2 / automatic water level recorder. For rain gauge station, although there are 6 rain gauge stations and it has a good network density, it fulfils WMO’s standard where the density requirement is 100-250 km2 / rain gauge station but it is not rational yet because the spreading is not evenly distributed by the influence area on each rain gauge station. And the result of the analysis relation network density of rain gauge station and automatic water level with stepwise method get 5 recommendations. Rational recommendations are recommendation 1 with 2 rain gauge stations and recommendation 2 with 3 rain gauge stations.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FT/2018/130/051801182 |
| Uncontrolled Keywords: | kerapatan jaringan pos hujan, standar WMO, hubungan pos hujan dan pos duga air, metode stepwise |
| Subjects: | 600 Technology (Applied sciences) > 628 Sanitary engineering > 628.1 Water supply > 628.11 Sources > 628.112 Lakes, rivers, springs |
| Divisions: | Fakultas Teknik > Teknik Pengairan |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 17 Apr 2018 01:42 |
| Last Modified: | 18 Oct 2021 07:03 |
| URI: | http://repository.ub.ac.id/id/eprint/9484 |
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Lampiran 1. Perhitungan Uji Konsistensi, Ketidakadaan Trend, Stasioner dan Persistensi Pos Hujan.pdf Download (600kB) | Preview |
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DAFTAR PUSTAKA.pdf Download (138kB) | Preview |
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Lampiran 3. Tabel T, F, Variat Acak Distribusi Normal dan Durbin Watson.pdf Download (2MB) | Preview |
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Lampiran 2. Perhitungan Pengisian Data Debit yang Hilang.pdf Download (275kB) | Preview |
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BAGIAN DEPAN.pdf Download (2MB) | Preview |
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Lampiran 4. Hasil Analisa Regresi Metode Stepwise Pos Hujan Rekomendasi.pdf Download (343kB) | Preview |
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3. Plagiasi.pdf Download (1MB) | Preview |
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2. Lembar Pengesahan.pdf Download (405kB) | Preview |
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1. Cover.pdf Download (251kB) | Preview |
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5. Lembar Peruntukan.pdf Download (55kB) | Preview |
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4. Penyataan Orisinalitas.pdf Download (451kB) | Preview |
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6. Ringkasan.pdf Download (134kB) | Preview |
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8. Pengantar.pdf Download (131kB) | Preview |
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7. Summary.pdf Download (159kB) | Preview |
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10. Daftar Tabel.pdf Download (146kB) | Preview |
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9. Daftar Isi.pdf Download (135kB) | Preview |
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11. Daftar Gambar.pdf Download (106kB) | Preview |
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12. Daftar Lampiran.pdf Download (96kB) | Preview |
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BAB I.pdf Download (198kB) | Preview |
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