scholarly journals Evaluation of Different Runoff Curve Number (CN) Approaches on Water Regulation Services Assessment in Intermittent Micro Catchment Dominated by Oil Palm Plantation

Agromet ◽  
2021 ◽  
Vol 35 (2) ◽  
pp. 73-88
Author(s):  
Yudha Kristanto ◽  
Suria Darma Tarigan ◽  
Tania June ◽  
Enni Dwi Wahjunie
Keyword(s):  
Oil Palm ◽  
Swat Model ◽  
Curve Number ◽  
Assessment Tools ◽  
Soil Water Storage ◽  
Water Regulation ◽  
Runoff Generation ◽  
Oil Palm Plantation ◽  
Regulation Services ◽  
Runoff Curve Number

Surface runoff is a primary driving factor for water regulation services on oil palm plantations as it determines the hydrological components and other biogeochemical process. Therefore, understanding on their interaction and contribution within the watershed system is important to support decision-making system. Here, we applied Soil and Water Assessment Tools (SWAT) model to simulate water regulation services for an intermittent micro-catchment dominated by oil palm plantation in Harapan Landscapes, Batanghari Regency, Jambi Province. In this study, we used two different runoff curve number (CN) approaches in the SWAT model, namely the soil moisture curve number (CN-SM) and the plant evaporation curve number (CN-ET), to evaluate their applicability and uncertainty for assessing water regulation services. SWAT was automatically calibrated and validated against daily observed streamflow data. The results showed that the model performed well as indicated by hydrograph visual interpretation and statistical indicators. The performance was good for calibration and validation for both approaches with high R2 and Nash-Sutcliffe Efficiency (NSE). Also, the uncertainty was acceptable with P-factor >70% and R-factor <1. Differences in CN-SM and CN-ET's conceptual structure have caused variations in the calibrated parameters' best-fit value and their sensitivity to streamflow simulations, which implicated for other components' output water regulation services. However, CN-ET approach was less responsive to area's biophysical conditions for runoff generation than CN-SM one.  This implicated that CN-ET generated low soil water storage and an overestimated actual evapotranspiration. This modeling exercise showed selection of a runoff CN approach by considering biophysical characteristics is important for calculating and simulating water balance component in such watershed. The accuracy of the simulation will significantly influence watershed management recommendations to improve water regulation's sustainability.

scholarly journals Estimation of Runoff Curve Number for Ungaged Watershed using SWAT Model

2009 ◽  
Vol 51 (6) ◽  
pp. 11-16
Author(s):  
Jin-Won Lee ◽  
Nam-Won Kim ◽  
Jeong-Woo Lee ◽  
Byung-Ha Seo
Keyword(s):  
Swat Model ◽  
Curve Number ◽  
Runoff Curve Number

scholarly journals MAPPING THE EFFECTS OF AGRICULTURAL DEVELOPMENT TO WATER YIELD USING REMOTE SENSING

2019 ◽  
Vol XLII-4/W16 ◽  
pp. 131-136
Author(s):  
B. Ba’iya ◽  
M. Hashim
Keyword(s):  
Oil Palm ◽  
Agricultural Development ◽  
Land Use Changes ◽  
Assessment Tools ◽  
Qualitative Assessment ◽  
Water Yield ◽  
Primary Forest ◽  
Yield Increase ◽  
Oil Palm Plantation ◽  
Average Water

Abstract. Variation of land cover status, like clearance of forest for agricultural (oil palm) plantation activities, may lead to rapid landscape development. Also, it may cause climate variation effects like excessive rainfall and flooding, which may result in loss of properties and lives. Agricultural (oil palm) plantation‟s dispersed canopy and the open surface of the ground compared to primary forest cause much more runoff and streamflow or discharge. Hence, this paper analyses the land-use changes and evaluate its influence on water yield using the Soil Water Assessment Tools model. Quantitative and qualitative assessment to examine the successive variation from forest to agriculture has been carried out between 2000 and 2010. The results indicate that the conversion of forest to agriculture has a significant influence on hydrological properties of the study area, which cause average water yield increase by 1.93% in the area between 2000 and 2010. Which, in turn, can lead to dryer during the dry season and wetter during rainy seasons. Furthermore, forest and water body are directly proportional. Similarly, forest and agriculture are inversely proportional with R2 > 0.85, p = 0.001. The study shows the ability of Landsat in monitoring the assessment of forest to agriculture, which causes changes in hydrology. This study offers a useful input of planning and sustainable management of surface and water resources.

DIVERSITY OF MICROCHIROPTERAN BATS IN FOREST FRAGMENTS AND RIPARIAN ZONES IN AN OIL PALM PLANTATION ESTATE

SIMBIOSA ◽  
2014 ◽  
Vol 3 (1) ◽  
Author(s):  
Fauziah Syamsi
Keyword(s):  
Oil Palm ◽  
Riparian Zones ◽  
Habitat Patch ◽  
Forest Fragments ◽  
Oil Palm Plantation

Kelapa sawit merupakan salah satu tanaman meningkat paling pesat di dunia, dan mencakup lebih dari 13 juta ha di Asia Tenggara. Sumatera memiliki sejarah yang relatif panjang budidaya kelapa sawit komersial, dan banyak perkebunan telah menggantikan hutan hujan. Biasanya ini perkebunan monokultur mendukung spesies lebih sedikit daripada hutan, namun ada sangat sedikit informasi yang tersedia untuk kelelawar. Kami mencicipi kelelawar pemakan serangga di Sumatera Barat dalam perkebunan kelapa sawit matang di mana beberapa tutupan hutan dipertahankan di fragmen hutan di bukit-bukit dan di sepanjang sungai. Menggunakan total 180 kecapi perangkap malam kami dibandingkan dengan komunitas kelelawar dalam tiga jenis habitat: patch hutan, zona riparian dan perkebunan. Total kami ditangkap 1108 kelelawar yang mewakili 21 spesies dan 5 keluarga, dan mayoritas ini (dalam hal spesies dan kelimpahan) ditemukan di fragmen hutan. perkebunan kelapa sawit ditemukan menjadi habitat miskin untuk kelelawar - hanya empat orang dari dua spesies ditangkap. daerah pinggiran sungai didukung keanekaragaman menengah, dan mungkin penting sebagai koridor satwa liar antara fragmen hutan. Kata kunci : Biodiversitas, keleawar Microchiropteran

HEALTHINESS OF OIL PALM PLANTATION TOWARDS SUSTAINABILITY OF ENVIRONMENT

2020 ◽  
Vol 7 (1) ◽  
pp. 21
Author(s):  
Faradina Marzukhi ◽  
Nur Nadhirah Rusyda Rosnan ◽  
Md Azlin Md Said
Keyword(s):  
Oil Palm ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Satellite Image ◽  
Vegetation Indices ◽  
Soil Nutrient ◽  
Oil Palm Plantation ◽  
Sustainable Environment ◽  
Moisture Analysis ◽  
The Relationship

The aim of this study is to analyse the relationship between vegetation indices of Normalized Difference Vegetation Index (NDVI) and soil nutrient of oil palm plantation at Felcra Nasaruddin Bota in Perak for future sustainable environment. The satellite image was used and processed in the research. By Using NDVI, the vegetation index was obtained which varies from -1 to +1. Then, the soil sample and soil moisture analysis were carried in order to identify the nutrient values of Nitrogen (N), Phosphorus (P) and Potassium (K). A total of seven soil samples were acquired within the oil palm plantation area. A regression model was then made between physical condition of the oil palms and soil nutrients for determining the strength of the relationship. It is hoped that the risk map of oil palm healthiness can be produced for various applications which are related to agricultural plantation.

PROPERTIES IMPROVEMENT AND HYDROPHOBICITY PREVENTION OF PEAT SOIL IN OIL PALM PLANTATION THROUGH STEEL SLAG APPLICATION

2016 ◽  
Vol 24 (1) ◽  
pp. 39-46
Author(s):  
Winarna Winarna ◽  
Iput Pradiko ◽  
Muhdan Syarovy ◽  
Fandi Hidayat
Keyword(s):  
Soil Ph ◽  
Oil Palm ◽  
Water Retention ◽  
Peat Soil ◽  
Steel Slag ◽  
Field Capacity ◽  
Ash Content ◽  
Oil Palm Plantation ◽  
Randomized Design ◽  
Four Levels

Development of oil palm plantation on peatland was faced with hydrophobicity problem caused by over drained. Hydrophobicity could reduce water retention and nutrient availability in the peat soil. Beside of proper water management application, addition of soil ameliorant which contain iron could increase stability and improve peat soil fertility. The study was conducted to obtain the effect of steel slag on peat soil properties and hydrophobicity. In this study, peat soil was incorporated with steel slag and incubated in 60 days period. The research was employed completely randomized design (CRD) factorial 2 x 2 x 4. First factor is peat maturity consists of two levels: sapric (S) and hemic (H), while the second factor is soil moisture which also consist of two levels: field capacity (W1) and dry (under the critical water content) (W2). The third factor is steel slag dosage which consist of four levels: 0 g pot (TB0), 7.17 g pot (TB1), 14.81 g -1 -1 pot (TB2), and 22.44 g pot (TB3). The result showed that application of steel slag significantly increase of soil pH, ash content, and water retention at pF 4.2. Furthermore, application of steel slag significantly reduce time for water reabsorption (wettability) in sapric. On the other hand, there are negative corellation between water penetration and soil pH, ash content, and water retention at pF 4.2. Overall, application of steel slag could increase wettability and prevent peat soil hydrophobicity.

SMALLHOLDERS' AND COOPERATIVES' READINESS ANALYSIS IN OIL PALM SMALLHOLDERS' PLANTATION REPLANTING PROGRAM (Case Study of Farmers in Ophir, West Pasaman Regency, West Sumatra Province)

2017 ◽  
Vol 25 (3) ◽  
pp. 171-182
Author(s):  
Rizki Amalia ◽  
Ratnawati Nurkhoiry ◽  
Zulfi Prima Sani Nasution ◽  
Ambar Kurniawan
Keyword(s):  
Oil Palm ◽  
Development Program ◽  
Business Development ◽  
Good Faith ◽  
Readiness Assessment ◽  
Oil Palm Plantation ◽  
West Sumatra ◽  
Research Objects

The study of replanting models for smallholding oil palm plantation analysis is focus on smallholders and cooperatives' readiness assessment involves in replanting and business development program. The research objects are four oil palm plantantion cooperatives (KPS) in Ophir, West Pasam: KPS Perintis, KPS Indah, KPS Maju and KPS Makmur. Smallholders readiness in replanting and business development program was assessed through three criterias, which are ability to repay of debt, good faith to join community, and cooperative capacity. The results showed that smallholders in KPS Ophir are basically ready and feasible in obtaining financing and follow the oil palm replanting program, but access to financing and regulations that requires avalis become constrains for the smallholders.

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