Mapping of groundwater potential zones using the analytic hierarchy process (AHP) model with geo-spatial data in Cambodia | |
| Author | Sainglong Kaing |
| Call Number | AIT Thesis no.RS-14-07 |
| Subject(s) | Groundwater--Remote sensing--Cambodia Land use--Remote sensing--Cambodia |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Remote Sensing and Geographic Information Systems |
| Publisher | Asian Institute of Technology |
| Abstract | Cambodia is an agricultural country whereas more than 70% of total population are farmers. However, the irrigation systems remain lacking to manage surface water. That is why Cambodia has been using 69% of groundwater for irrigated farmlands. Likewise, Banteay Meanchey Province is one of the most rice-growing provinces at the northwest of Cambodia. The groundwater potential zones are still remaining unknown in the many area of Banteay Meanchey Province. This study, therefore, aimed to use geo-spatial data to generate considerably possible thematic maps such as slope, landuse and land cover, lithology, drainage density, and surface water bodies; and integrate them for groundwater potential zones. The maps were produced from GIS data and SRTM DEM. To obtain the better result of the weight assignment, either local or academic experts were considered only whose related experiences are about geology, hydrogeology, environmental science, and well drilling and projects. To weight main criteria, i.e. thematic maps, AHP model were used to separately check consistency of experts rank. The results proved that the academic researchers have answered more consistent than the local people whose consistency ratios are CR=0.05 and CR=0.09 respectively. The sub-criteria, map classes; on the other hand, were ranked by a 1-4 scale where 1 is less favorable and 4 states the most favorable. The results obtained that slope map contributed to the groundwater storing the most which was 40% where did the lithology, landuse/land cover, drainage density and surface water bodies maps were about 20%, 18%, 16% and 6% respectively. The groundwater potential zones map was the integration of thematic maps by means of weighted overlay analysis with respecting criteria and sub-criteria weights. The evidence was that more than half of wells were found in high potential zones of groundwater and the rest was located in both low and medium groundwater potential zones. As the results, the study had found 44% of high, 52% of medium and 4% of low groundwater potential zones in Cambodia. The low potential of groundwater is mostly locating at the mountainous areas of the country. |
| Year | 2014 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Remote Sensing (RS) |
| Chairperson(s) | Nagai, Masahiko |
| Examination Committee(s) | Taravudh Tipdecho;Shrestha, Sangam |
| Scholarship Donor(s) | Government of Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2014 |