The Bangka Belitung Islands experience population growth which continues to increase every year. This population growth causes several problems, including water scarcity. The solution to this problem is to use water as a raw source to meet the need for clean water. The source of this raw water is by utilizing Kulong water. This study aims to find a solution by getting the location of the raw water source, namely Kulong, which has an effective distance from the location of community settlements. In this study, the mapping will be carried out using a Geographic Information System (GIS). The results of this study are that there is Kulong ST 12 which can be used as a source of raw water, and the best model for predicting water availability from 2022-2030 is the SARIMA (3,0,3) (3,1,0)12 model. The availability of water for Kulong ST 12 in 2030 is 10.03 l/s, with a water demand of 4.581 l/s in Surya Timur Village. For Reliability, Kulong ST 12, using the Standard Operating Rule (SOR), is able to supply 100% of the needs of the East Surya Output with a 100% reliability level.

Oil palm is a leading plantation commodity in Indonesia with the industrial distribution area covering Sumatra, Kalimantan, Sulawesi and surrounding areas. This study aims to model the semivarogram of the distribution of oil palm production in Indonesia. The data used in this study is secondary data obtained through the official website of the Indonesian Central Statistics Agency (BPS), in the form of data on oil palm production in 34 provinces in Indonesia from 2012 to 2021. The method used in this study is an experimental semivariogram method. , then fitting the model from five models, namely Exponential model, Spherical model, Gaussian model, Logarithmic model and Wave model (holt effect) by looking at the value of the Nugget effect (Co). Based on the discussion of the number of models that are suitable to see the highest palm oil production in Indonesia, the Wave (hol effect) model with a Nugget effect value of 0 and the foem of the equation is...*

Desa Air Mesu dan Desa Jeruk merupakan dua desa yang terletak di Kecamatan Pangkalan Baru, Kabupaten Bangka Tengah, Provinsi Kepulauan Bangka Belitung. Jumlah penduduk di desa tersebut meningkat setiap tahunnya sehingga menimbulkan permasalahan yaitu bertambahnya kebutuhan air bersih di desa tersebut. Solusi dari permasalahan tersebut adalah memanfaatkan air Kulong PL sebagai sumber air baku untuk memenuhi kebutuhan air bersih di Desa Air Mesu dan Desa Jeruk. Untuk memastikan ketersediaan air Kulong PL mampu mencukupi kebutuhan air bersih di Desa Air Mesu dan Desa Jeruk maka akan dilakukan prediksi (forecasting) selama 10 tahun kedepan yaitu tahun 2021 sampai tahun 2030. Dari hasil analisis didapatkan model terbaik untuk memprediksi debit bangkitan yaitu SARIMA (0,0,0)(1,1,0)12 . Berdasarkan analisis SOR, pilihan terbaik dalam pemanfaatan Kulong PL difokuskan dalam satu desa saja. Jika penggunaan Kulong PL menginginkan keandalan 100%  maka penggunaan air yang diperbolehkan yaitu sebesar 3,06 l/det. Sedangkan untuk Desa Jeruk, Kulong PL mampu menyuplai 100% kebutuhan dengan tingkat keandalan 99%.