The Surabaya-Lamongan Groundwater Basin's Chemical-Physical, Statistics, and LULC Properties
Description
Data of chemical, physical properties, & statistics of the Surabaya-Lamongan Groundwater Basin, Indonesia; Surface elevation of the Surabaya-Lamongan Groundwater Basin (SLGB) references from the National Digital Elevation Model (DEMNAS) provided by Badan Informasi Geospatial (BIG), covering sheets 1609-11; 1608-43,41; 1509-21,22,31,32; and 1508-51,52,53,61,62,63,64; Land Use Land Cover (LULC) based on Landsat 7 ETM+ and 8 OLI. Inaddition, these are pumping test data from 25 groundwater wells of 58 the total datasets on Surabaya-Lamongan Groundwater Basin (SLGB). The results of the pumping test indicated average values for transmissivity (T), storativity (S), and hydraulic conductivity (K) of 37.6 m²/d, 4.27, and 12.94 m/d, respectively. We choose Theis method to assess all the wells.
Files
Steps to reproduce
1. We are taking grab samples of water from the groundwater at each test location. A total of 58 samples were gathered from the field. Both deep and shallow wells are used to gather those. Using a plastic bucket, we obtained grab samples from the shallow wells. For the deep wells, we used a bailer sampler (Indonesian Standard No. 6989. 57,year 2008), and we collected the samples into 1,000 mL pre-sealed polypropylene bottles. 2. Meanwhile, we next submit them to a lab for a more thorough study of phosphate. Within 48 hours of being collected, the samples were examined in the analytical laboratory using ice cubes in a box (Indonesian Standard No. 6989. 57 year 2008; US Environmental Protection Agency, 2002; the Indonesian Standard Chemical:IK/KIM.35/05-18). In laboratory, we used spectrophotometric analysis techniques to measure phosphate levels in groundwater samples. The basic principle involves the reaction between phosphate and a specific reagent (e.g. ammonium molybdate), which produces a light blue color (phosphomolybdate complex). The intensity of this color is then measured with a spectrophotometer at a specific wavelength (usually around 690-880 nm). This method is relatively straightforward to execute in the laboratory using standard equipment, such as: a. UV-Vis spectrophotometer. b. Chemical reagents (ammonium molybdate, sulfuric acid, etc.). c. Glassware and measuring pipettes. Steps to analyze groundwater samples include: a. Collecting groundwater samples. b. Adding reagents to form the phosphomolybdate complex. c. Measuring absorbance using a spectrophotometer. d. Calculating phosphate concentration based on a calibration curve. 3. Related to the analysis of statistical data into the Jamovi system is done as follows: a. input data on the chemical and physical content of each groundwater sample; b. data system then analyzing the mean difference test using the one sample t-test, independent sample t-test, and one way ANOVA methods respectively to determine the difference in the content of compounds/elements compared to the threshold value, the difference in the mean content of compounds in two different groups, and to determine the mean difference in compounds/elements in several different groups (more than two). 4. The DEMNAS satellite imagery data of Surabaya-Lamongan Groundwater Basin (SLGB) are compiled in various sources, which are: Landsat 7 ETM+ (30 m resolution) for year 2000, Landsat 8 OLI (15 m resolution) for year 2021. The DEMNAS spatial resolution is 0.27-arcsecond, using the EGM2008 vertical datum.
Institutions
- Universitas Muhammadiyah Kalimantan Timur
- Institut Teknologi Bandung
- Institut Teknologi Sumatera
- University College London