Effects Of Rubber Plantation Policy On Water Resources And Landuse Change In The Northeastern Region Of Thailand

In recent decades, there are lots of the changes of land use in the Liusha River basin in Xishuangbanna, Yunnan Province. The large-scale replacement of natural forests by rubber plantation have had a certain impact on the ecological environment and water resources in the Liusha River basin. Based on the data of runoff, rainfall and evaporation from 1963 to 2015 measured by Menghai Hydrological Station of Liusha River, the effects of climate change and human activities on the ecological environment of Liusha River runoff and the degree of change were analyzed by using the comparison method of slope change rate of runoff accumulation. The research results show that the cumulative amount of runoff flow after mutation presents significant decrease trend from 1963 to 2015. Because of the Liusha river runoff change decision which residents downstream watershed water security, the runoff of the ecological environment situation and analysis, the protection of natural resources such as forests and the effective protection of regional water resources sustainable development has important guiding significance.

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Analisis Ketersediaan Air Permukaan dan Proyeksi Kebutuhan Air DAS Bodri Tahun 2040

Majalah Geografi Indonesia ◽

10.22146/mgi.62382 ◽

2021 ◽

Vol 35 (1) ◽

pp. 84

Author(s):

Chafda Larasati ◽

Aji Wijaya Abadi ◽

M Galih Prakoso ◽

Novanna Dwi S ◽

Venny Vivid F ◽

...

Keyword(s):

Surface Water ◽

Water Resources ◽

Water Balance ◽

Water Availability ◽

Water Demand ◽

Total Water ◽

Landuse Change ◽

Calculation Of Parameters ◽

Surface Water Resources ◽

Total Water Demand

Abstrak Sumberdaya air penting untuk pemenuhan kebutuhan semua makhluk hidup termasuk manusia. DAS Bodri menyediakan suplai air permukaan melalui sungai-sungai yang ada dalam DAS, yang dapat dimanfaatkan oleh penduduk sekitar. Seiring berjalannya waktu, DAS Bodri mengalami perubahan penggunaan lahan yang menyebabkan terjadinya peningkatan kebutuhan air dan terjadi ketidakseimbangan antara kebutuhan dan ketersediaan air permukaan. Tujuan dari penelitian ini, yaitu mengetahui keseimbangan antara kebutuhan air di masa yang akan datang dengan ketersediaan air permukaan di DAS Bodri tahun 2040. Perhitungan keseimbangan antara kebutuhan dan ketersediaan air permukaan dilakukan dengan membandingkan antara kebutuhan air total dan ketersediaan air permukaan. Parameter kebutuhan air total terdiri dari kebutuhan air domestik, fasilitas kesehatan, fasilitas pendidikan, fasilitas peribadatan, perkantoran, industri, pertokoan dan pasar, warung makan, peternakan, irigasi, dan tambak. Kebutuhan air di tahun mendatang diketahui melalui proyeksi secara eksponensial dan tetap dari data jumlah dalam perhitungan parameter. Kebutuhan air untuk aktivitas domestik dan nondomestik diestimasikan mencapai 2,44 miliar m3 pada tahun 2040. Hasil analisis neraca air menunjukkan bahwa status neraca air DAS Bodri tahun 2010-2019 mengalami defisiensi. Hal tersebut menunjukkan bahwa potensi sumberdaya air permukaan masih belum mencukupi untuk pemenuhan kebutuhan air di DAS Bodri hingga tahun 2040. Abstract Water resources play an important role in meeting the needs of all living things, including humans. The Bodri watershed provides surface water supply through rivers on the watershed, which the local residents can use and utilize. Over time, the Bodri watershed underwent landuse change, which led to an increase in water demand, resulting in an imbalance between water demand and surface water availability. Calculation of the balance between demand and surface water availability is done by comparing the total water demand and the surface water availability. This study aims to determine the balance between future water demand and surface water availability in the Bodri watershed in 2040. The parameters used to determine total water demand consist of water needs of the following sectors; domestic, health facilities, educational facilities, religious facilities, offices, industry, shops and markets, food stalls, livestock, irrigation, and ponds. In the coming year, water demand is known through projections exponentially and permanently from the amount of data in the calculation of parameters. Water demand for domestic and non-domestic activities is estimated to reach 2.44 billion m3 in 2040. The water balance analysis results show that the status of the Bodri watershed water balance in 2010-2019 is deficient. The potential for surface water resources is still insufficient to meet the water needs in the Bodri watershed until 2040.

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Pengaruh Kelas Kemiringan Lereng dan Penggunaan Lahan terhadap Sifat Fisik Tanah di Kawasan Penyangga Waduk Cirata Kecamatan Cipeundeuy Kabupaten Bandung Barat

SoilREns ◽

10.24198/soilrens.v14i1.9268 ◽

2016 ◽

Vol 14 (1) ◽

Author(s):

Apong Sandrawati ◽

Ade Setiawan ◽

Gilang Kesumah

Keyword(s):

Bulk Density ◽

Power Plants ◽

Water Reservoir ◽

Physical Property ◽

Analysis Data ◽

Rubber Plantation ◽

Landuse Change ◽

Land Unit ◽

Porosity And Permeability ◽

Independent Variable

Waduk Cirata is one of impormant water reservoir in West Java. This reservoir was used for supporting power plants for Java and Bali’s area. It’s need more attention to keep the function continuity of Waduk Cirata. Greenbelt area was one of factor determinant for establishment of Waduk Cirata. Landuse change in greenbelt area is a great threat for greenbelt area sustainability, future more to establishment of Waduk Cirata. This research was aimed to study the effect of landuse and slope combination to physical property of soil. The research was conducted in greenbelt area of Waduk Cirata, located in Margalaksana and Nenggeleng Village, Cipeundeuy District, Bandung Barat. The independent variable was three landuse type and two class of slope, so that were six combination variable that repeated four times, so there was 24 land unit. This land unit determinedwith overlay tools in ArcGIs software. Statistical analysis used for determined the effect andrelationship between parameter. Based on analysis data, combination of landuse type and class of slope not influence bulk density, porosity, and permeability value. Rubber plantation with class of slope 8-15% has higher bulk density (1.24 g/cm3) and higher porosity (66.7 %), meanwhile, the higher of permeability (9.31cm/hour) found in cocoa plantation with class of slope 16-25%.Keywords: greenbelt area, landuse, class of slope, bulk density, porosity, permeability.

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