Evaluasi Tingkat Keberhasilan Pengeboran Sumur Bor Dalam Secara Manual Guna Penyediaan Air Minum Pedesaan (Studi Kasus Desa Manyarejo, Desa Jabung, Desa Gedongan dan Desa Sidokerto Kecamatan Plupuh Kabupaten Sragen)

Retnaningtyas, Gati Rahayu and -, Dr. Sri Sunarjono, Ph.D and -, Ir. Isnugroho, CES (2017) Evaluasi Tingkat Keberhasilan Pengeboran Sumur Bor Dalam Secara Manual Guna Penyediaan Air Minum Pedesaan (Studi Kasus Desa Manyarejo, Desa Jabung, Desa Gedongan dan Desa Sidokerto Kecamatan Plupuh Kabupaten Sragen). Thesis thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Water is a major need for organism, including human being. Water existence influences everyday life, in fact many efforts were done to fulfill this need. In row with population growth, organism need of water is more and more every year. Surface water availability is no longer sufficient, therefore it is the right time to optimize ground water exploration using deep drilling well. Deep drilling wells are reguired due to the unbalanced of water need with water discharge, mostly in summer. In the other hand, the succes rate of deep drilling wells is still low. In this research, drilling points are in Desa Sidokerto, Desa Manyarejo, Desa jabung and Desa Gedongan, kecamatan Plupuh, Kabupaten Sragen. These locations are selected because in drilling phases are found some incompatibilities with appointed Standard Operating Procedure (SOP), so they lead some problems. The purposes of this research are: 1. The analysis of deep wells drilling manually, 2. The evaluation of obstacles and problems which are often rise while drilling those wells, 3. The analysis of pump capacity and reservoir basin. Datas which are necessary for deep wells construction are: soil cutting data, electrical logging data, and pumping test data, in the other hand, datas which are needed to count the pump capacity and reservoir basin are total population data (inhabitants), house connections data, total population projection data for 15 years in the future, and water need data for house connection of rural category that is 60 litres/person/day. Drilling phases consists of: 1. Preparation. It covers (toolsmobilization dan site preparation. Site preparation consists of mud bath construction and assembly of (tools); 2. Drilling. It covers pilot hole project, electrical logging, reaming hole project, construction (pipes installation), gravel packing, developing and grouting process; 3. Post-drilling. It covers pumping test and finishing. Some obstacles and problems which are often rise are: 1. Electrical logging is frequently not done, whereas if only taking the sample of soil every meter is not accurate, 2. Reaming hole project or widening hole project in this phase is still not enough, so when putting in the construction pipes is difficult enough, 3. Gravel pack sorting is not done carefully. Gravel pack should be 5-7 mm, round, fine cut, and must be washed before put between pipes and soil, 4. Developing is not done so the water is less clear and containing sludge, 5. Grouting or moulding process is done from aquifer that is not be used by people or from soil surface to impermiable layer (waterproof layer) so surface water can not be seeping into the well. In fact, some drillers who just exploit that surface water seepage, 6. Pump capacities and reservoir basin are less appropriate to the need so water distribution is not prevalent. In Manyarejo, pilot hole drilling reaches 90 meters and 80 meters well construction and cutting analysis estimates that act as ground water carrier layer (aquifer layer) is 36-48 meters sandy clay and sand, 56-68 meters is sand, clay, sandy loam. The placement of Submersible Grundfos SP5A-12/ 1.5HP is 42 meters in depth, water need reaches 2.063 liters/ second to serve 2476 person or 495 house connections, and pump capacity reaches 7,000 liters/hour while reservoir basin volume based on need is 30,345 liters. The result of drilling shows 1.8 liters/ second wells debit. It is only taken 1.6 liters/ second to serve 460 house connections, it means water debit is sufficient but the pump capacity only produces 5 m3/ hour or 5,000 liters/ hour water debit and reservoir basin capacity is just 18,000 liters, so it is really needed to make more wells or runs open and close take turns system service in water use, because it will be only 92 % population that are served. In Jabung, pilot hole drilling reaches 82 meters and 80 meters well construction and cutting analysis estimates that act as ground water carrier layer (aquifer layer) is 44-50 meters sand, 56-64 meters is sand, sandy clay, and 68-72 meters is sand. The placement of Submersible Grundfos SP5A-12/ 1.5HP is 42 meters in depth, water need reaches 2.946 liters/ second to serve 3,534 person or 707 house connections, and pump capacity reaches 10,000 liters/ hour while reservoir basin volume based on need is 43.317 liters. The result of drilling shows 1.75 liters/ second wells debit. It is only taken 1.5 liters/ second to serve 420 house connections, it means water debit is sufficient but the pump capacity only produces 5 m3/ hour or 5,000 liters/hour water debit and reservoir basin capacity is just 18,000 liters, so it is really needed to make more wells, because it is only 59 % population that are served. In Gedongan, pilot hole drilling reaches 100 meters and 76 meters well construction and cutting analysis estimates that act as ground water carrier layer (aquifer layer) is 44-50 meters sandy dessert, 56-64 meters is sandy dessert, and 68-72 meters is padas. The placement of Submersible Grundfos SP5A-17/ 2HP is 48 meters in depth, water need reaches 3.863 liters/ second to serve 4,633 person or 927 house connections, and pump capacity reaches 12,000 liters/hour while reservoir basin volume based on need is 71,166 liters. The result of drilling shows 1,8 liters/ second wells debit. It is only taken 1,6 liters/ second to serve 460 house connections, it means water debit is sufficient but the pump capacity only produces 5 m3/ hour or 5,000 liters/ hour water debit and reservoir basin capacity is just 18,000 liters, so it is really needed to make more wells, because it is only 49 % population that are served. In Sidokerto, pilot hole drilling reaches 84 meters and 80 meters well construction and cutting analysis estimates that act as ground water carrier layer (aquifer layer) is 52-60 meters sandy dessert, 64-72 meters is sandy limestone and 76-80 meters is limestone. The placement of Submersible Grundfos SP5A-17/ 2HP is 48 meters in depth, water need reaches 2.425 liters/ second to serve 2,906 person or 582 house connections, and pump capacity reaches 8,000 liters/hour while reservoir basin volume based on need is 38,442 liters. The result of drilling shows 3,5 liters/ second wells debit. It is only taken 2.5 liters/ second to serve 582 house connections, it means water debit is sufficient but the pump capacity only produces 5 m3/ hour or 5,000 liters/ hour water debit and reservoir basin capacity is just 18,000 liters, so it is a must to raise the pump and reservoir basin capacity to gain 100 % service, if it is not done the water distribution will not prevalent. The analysis result shows the relation between water need, pump capacity, pump breaks pattern and reservoir basin capacity is directly proportional. Pump capacity and reservoir basin capacity must be suitable to suffice water need. If water need is geting bigger, so pump capacity and reservoir basin must be bigger too. In the other hand, reservoir basin capacity is affected by pump breaks pattern too. In 2 hours continously breaks pattern will need smaller reservoir basin capacity commpares to 1 hour plus 1 hour uncontinously breaks pattern which need bigger reservoir basin capacity. Understanding of those things, so the effectiveness and cost efficiency can be calculated since the beginning.

Item Type: Karya ilmiah (Thesis)
Uncontrolled Keywords: deep wells drilling, obstacles and problems, water need, pump capacity and reservoir basin volume, pump breaks pattern
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Fakultas Pasca Sarjana > Magister Teknik Sipil
Depositing User: GATI RAHAYU RETNANINGTYAS
Date Deposited: 11 Feb 2017 07:42
Last Modified: 11 Feb 2017 07:42
URI: http://eprints.ums.ac.id/id/eprint/49861

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