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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Makara Journal of Science Jurnal Geografi LIngkungan Tropik (Journal of Geography of Tropical Environments)
Djoko Harmantyo
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Immunology & microbiology Veterinary

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VARIABILITAS CURAH HUJAN DI KABUPATEN KEBUMEN Indratmoko, Satria; Harmantyo, Djoko; Kusratmoko, Eko
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 1, No. 1
Publisher : UI Scholars Hub

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Abstract

Rainfall is highly variable climate elements, either in space or time scale. Variation of this rainfall will have an impact on the determination of the start of the planting of rice plants in particular. Through a statistical calculation and mapping of spatial data, this research will reveal a pattern of early growing season in response to rainfall variability in Kebumen Regency over a period of thirty years, i.e. 1981-2010. Spatial analysis with a reinforced approach statistics reveal that the coastal region in Kebumen Regency have a high rainfall variability with an average of rainfall is low. The higher the variability of annual precipitation totals declined, followed by the average rainfall is high. In addition, the beginning of paddy planting season begins in areas with low rainfall variability (the hills) to the region's high rainfall variability (coastal). In the period 1981-2000, paddy planting season begins early from the North and at regular intervals toward the South. On the other hand, in the period 2001-2010 paddy planting season begins early from the Northwest and at regular intervals toward the Southeast.
PEMEKARAN DAERAH DAN KONFLIK KERUANGAN Kebijakan Otonomi Daerah dan Implementasinya di Indonesia Harmantyo, Djoko
Makara Journal of Science Vol. 11, No. 1
Publisher : UI Scholars Hub

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Area divergence is a process to establish new autonomous region by dividing formerly local authority entity. This process was driven by the Regional Autonomy Law no. 32, 2004 which ensure decentralization mechanism to occur from. Spatial conflict is a term of interregional conflicts that is potentialy related to former administrative divided border line, which then will create border line dispute. This potential for any interregional relationship (including conflict) is a function neighbour number. According to an Internal Affairs report, thus recent phenomena of local divided authorities has been escalating in Indonesia. Since 1999-2005, there has been 148 new local autonomous governments or more than thirty new additional local autonomus government were born annualy. There are two main questions arise from these issues (1) what is the ideal number of local autonomous government in Indonesia, and (2) what is the quantity of interregional relationship needed to relate spatial conflicts. Based on the central place theory and a spatial conflicts model the ideal number of autonomous districts in Indonesia is 460 of kabupaten/kota and 46 provinces. Theoretically, they need 2760 forms of interregional relationships or six relationship forms in each local government to eliminate the spatial conflict potentialy. Rearrangement of regional autonomous policy focusing on the implementation of areal divergences shall be done as quickly as possible.
System Dynamics Modeling of Land Use Change in West Kalimantan, Indonesia Siregar, Pahrian Ganawira; Supriatna, Jatna; Koestoer, Raldi Hendro; Harmantyo, Djoko
BIOTROPIA Vol. 25 No. 2 (2018): BIOTROPIA Vol. 25 No. 2 August 2018
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3410.986 KB) | DOI: 10.11598/btb.2018.25.2.792

Abstract

The main effects of human activities on the environment result in land use and land cover changes. Land overexploitation and development activities in West Kalimantan of Indonesia necessitated the focus of this research which aims to analyze and predict land use changes in West Kalimantan. The results of such a study assist researchers, planners, and policy makers to formulate suitable land use policies in the future in order to balance economic development and natural resource conservation. Moreover, it makes Indonesia shift from middle income to become a developed country in 2030. Methodology employs field observation, key informant interviews, focus group discussions, and system dynamics modeling. The field observation covered communities in several locations in the study site to identify patterns of land use. The system dynamics was applied to analyze the land use change system and estimate the extents of land cover change in the future. The study showed several outcomes: (i) The main leverage factors in the land use change system in West Kalimantan were the desire to reach the expected economic growth and the increased per capita consumption of edible oil globally; (ii) In the business-as-usual modeling, the increasing global demand for edible oil will lead to significant increment of oil palm plantation area, even the total area of plantation could be wider compared to that of the remaining forest area by 2030; (iii) Key interventions that need to be considered in the future is to conduct reforestation (with reforestation rate of at least 0.5% per year) and limited oil palm plantation development to a maximum of 50% of developed area.
Co-Authors Aldri Frinaldi Indratmoko, Satria Jatna Supriatna Raldi Hendro Koestoer, Raldi Hendro Siregar, Pahrian Ganawira