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한국수자원학회 / v.8, no.2, 1975년, pp.30-40 
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Saudi Arabia 북서부의 지하수조사
( Groundwater Investigation in Northwestern Part of Saudi Arabia ) |
| 한정상;정수웅; 정회원기위토(지하수) 중앙개발(주) 개발부장;중앙개발(식) 지질과장;
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| 초 록 |
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| Hydrogeological survey and geophysical prospecting have been carried out in Saudi Arabia for the purpose of finding groundwater in the soil and rock at the request of General trading company in Jeddah, Saudi Arabia. The surveyed area is located on $38^{circ}-39^{circ}$ 30' in longitude and $26^{circ}-26^{circ}$ 30' in latitude. The topography of this area is dominated by northwest southeast mountain range composed mostly of precambrian rocks and basalt of tertiary period. Geology is mainly composed of greenstone, granite, andesite, diorite rhyolite of pre-cambrian era and sandstone of cambrian period which are underlained by basalt and andesite of tertiary period and alluvium of quaternary unconformably. The instruments used in this investigation are TR-18B2 radioactivity unit which isjapanese patented and A.C. Terrameter, a resistivity meter manufactured by ABEM of Stockholm, Sweden. Radioactivity method has been conducted along the Alula-Khaybar road, totally 164Km by the car-borne. As a result of the above survey 16 places have been selected and these anomalies show 1.2N-1.6N compared to background of each area in intensity with width of 10-50m. Resistivity vertical profiling which made use of Schlumberger configuration method has been made over selected areas by radioactivity method to provide hydrogeological information for a water resources survey. The result of resistivity shows that good aquifers are located in the western part of surveyed area where sedimentary rock is distributed. The strata showing 10-50, ${Omega}-m$ in resistivity are thought to be waterbearing layer. The variations in aquifer resistivity found, are thought to be due to verying clay content, which could be related to aquifer yield. It has proved impossible to detect small salinity variation in the buried aquifer by geophysics. As a result of resistivity prospecting 10 places are recommended to be drilled at the anomalies as shown attached map. yields from the proposed holes have been estimated approximately from $20m^3$ to $200m^3$ per day. Prior to drilling for groundwater, test boring using ${c}4"$ should be drilled in order to obtain more reliable hydrogeological information for the construction of perfect wells.ells. |
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| 키워드 |
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한국수자원학회지 / v.8, no.2, 1975년, pp.30-40
한국수자원학회
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO197511920088764)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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