ANALYSIS OF THE POTENTIAL OF NITROGEN-BASED NUTRIENT TRANSPORT TO THE GROUNDWATER IN SURROUNDING PADDY FIELD AREAS USES MODFLOW VISUAL SOFTWARE 2010.1 (CASE STUDY: PADDY FIELD AREA ROROTAN, CILINCING DISTRICT, NORTH JAKARTA)
The application of fertilizer is aimed to increase rice productivity, however not all the fertilizer has been utilized by the plant. The unused fertilizer in the form of soluble nutrients such as nitrogeneous compound may infiltrate to shallow groundwater creating nitrogeneous compound pollution. Ba...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/51839 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The application of fertilizer is aimed to increase rice productivity, however not all the fertilizer has been utilized by the plant. The unused fertilizer in the form of soluble nutrients such as nitrogeneous compound may infiltrate to shallow groundwater creating nitrogeneous compound pollution. Based on these problems the authors aim to conduct research related to the potential of nitrogen-based nutrient transport especially total nitrogen and it is effect on groundwater seen from the movement of these contaminants in groundwater using groundwater modelling Software namely visual modflow 2010.1. Basically, modflow software in this study is used to determine the direction and contour of the groundwater level in modelling. However, in this software, there are packages or fiture to describe or to predict how far the contaminants are moving. The equation used in this software is based on the application of the finite difference equation. The input data used in this study are hydraulic conductivity, porosity, pollutant concentration, topography, water level, and sampling coordinates. In this study, water moves from the South to the North in accordance with the contour of the groundwater level and its elevation.
The analysis method as well as the groundwater sampling method used were SNI 6989.58: 2008 concerning Water and Wastewater: Groundwater Sampling Method, Total Nitrogen (as N): UP.IK.21.01.20 (Calculation), Nitrate: APHA Ed. 23re 4500-NO3. E-2017, Potassium: APHA Ed. 23rd 3120.B, 3030.B-2017, Total Phosphate: APHA Ed. 23re 4500-P.B & E-2017. There are 5 main sample points in the form of monitoring wells or observation wells and 10 pumping welss (dummy) and 4 simulations for two sampling periods. Based on the model results with all simulations, the only well affected is well 1 which is 70 m away, from the rice field outlet, with the largest concentration of 0.0001 mg/l on period one and two. This is due to the small initial concentration input (3 mg/l and 5 mg |
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