DROUGHT ASSESSMENT USING RAINFALL DATA AND REMOTE SENSING IMAGES A CASE STUDY IN BLORA REGENCY, CENTRAL JAVA PROVINCE
| Main Authors: | , LUKI ARIYANTO, , Drs. Projo Danoedoro, M.Sc., Ph.D. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2012
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/100446/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=55500 |
Daftar Isi:
- The aims of this research were to (1) Identify areas facing high drought risk by combining remote sensing images, precipitation data and other thematic information, (2) Delineation of drought prone areas by integrating Meteorological, Hydrological and Physical terrain data, (3) To validated drought risk data results with existing local government data, (4) To provide suggestion of action plan for drought management in research area. The role of GIS technology can offer the ability to depict the spatial distribution of the extent and monitoring capability for natural disaster management. Matrix overlay function in ArcView GIS is applied to assess the drought risk areas in the Blora Regency. Seven parameters involved in accordance to the impacts on drought are rainfall, surface water and irrigation, sub-surface water, stream density, slope, soil drainage, and finally, land use. The intensity of impact is represented by the value assigned to the entries of each matrix. The study result illustrates that high drought mainly in the high elevation area middle region covering 18359.70 Ha of the total area i.e., 194845 Ha which is approximately 9.44 %. The high risk drought class of Meteorological, Hydrological and Physical terrain data covers an area of 36883 Ha, 7352 Ha and 45549 Ha respectively. The result obtained are moderate satisfactory for the analysis drought risk in the study area. Because the percentages of validation between droughts risk level and the level of the shortage water is around 61.91% match. Therefore, to further improve the accuracy of the result, several parameters must be improved ranking and rating for each parameter. Conclusion of this research, Alternative drought mitigation technologies that have been conducted in study area : Ponds (dam), ABSAH (closed rain water reservoir), PAH (open rain water reservoir), Rainwater catchment well, Cekok well (supply well), Deep well and Simple water purification. There are some suggestions for farmers: from production and economic analysis of some commodities after the first rice crop, plant onion highest benefits, followed by red chilly curly, rice crop and last corn plant. The third most profitable cropping pattern are rice � red onion � corn followed by rice � red chili curly and the last rice � rice � corn. These third cropping patterns are feasible to apply to the land.