#TITLE_ALTERNATIVE#

• Main Author: PALUPI , RETNO
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/12548
• Institution: Institut Teknologi Bandung

Rainfall pattern of Pasaman Barat generally follow equatorial pattern that has two peaks, with the first peak on April (335 mm) and the second on November (445 mm), and one valley on June (181 mm). In addition to equatorial pattern, it is guessed that there is monsoon effect and it is seen that there is anti-monsoon pattern (July: 267 mm).<p> <br /> <br /> <br /> Kriging is statistic method of interpolation based on variable regional theory. This method is achieved by comparing the graph of the difference between actual data and data got from each mathematical function, plotted on the distance of the two datas. This graph is known as semi-variogram.<p> <br /> <br /> <br /> Water surplus happens when rainfall (minus evapotranspiration potential) exceeds field capacity. So, the amount of water surplus comes from rainfall minus evapotranspiration potential and water needed to achieve maximum soil moisture condition. Water surplus will become surface flow (direct run off), base flow and infiltration. The amout of water that go through infiltration depends on the condition of a region.<p> <br /> <br /> <br /> The amount of base flow of each scenarion are: initial condition 95.35 million m3/year, scenario two 89.73 million m3/year and scenario three 92.54 million m3/year. After decreased by water need for production activity of the mining, still remain for initial scenario and scenario 3 as much as 5.35% and 2.54%, meanwhile scenario 2 that is total opening less 0.27% anually.