KAJIAN PENGARUH PERUBAHAN PENGGUNAAN LAHAN TERHADAP KOEFISIEN ALIRAN VOLUMETRIK STUDI KASUS DAS CILIWUNG BAGIAN HULU KABUPATEN BOGOR PROVINSI JAWA BARAT
| Main Authors: | , PRAYOGI PUTRA WIJAYA, , Dr. Dyah Rahmawati Hizbaron, S.Si., M.T., M.Sc. |
|---|---|
| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2013
|
| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/127073/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=67316 |
Daftar Isi:
- The land conversion which occurs on Ciliwung upstream watershed section is increasingly alarming as it viewed in terms of the environmental balance. The upstream watershed works as a water catchment area. Nowadays, it is contrary to the area designation with the physical development which occurs very rapidly. The change of land-use heavily affects the hydrological condition of upstream watershed section, due to the tendency of the nature of the land itself which is initally permeable to become impermeable. Some portion of the precipitation that falls becomes surface runoffs due to the soil ability, in relation to infiltration, is reduced. This study aimed to assess the effect caused by land conversion that occured in Ciliwung upstream watershed section against runoff coefficient changes during the period between 2000-2009. Data were analyzed quantitatively to determine the effect of land conversion substantially over the period 2000 to 2009 against runoff coefficient changes on Ciliwung upstream watershed section which studied using analysis of the relationship between rainfall and flood hydrograph were produced. The results showed that the decrease of forests and the other vegetated land-cover (such as rice fields and plantations) was about 0,21%. It was accompanied by the increase in the total area of residential and industrial buildings around 1,32% on Ciliwung upstream watershed during the period of 2000-2009. These have resulted in the annual increasing of average runoff coefficient in the period of 2000 - 2009 to 22,72%. The annual average runoff coefficient in 2000 still stands at 0,066 and increased significantly in 2009 with a value of 0,081.