Investigation of the Variation in Well Performance over Time Using Step Drawdown Tests

Öz

The purpose of this study is to investigate the variation in well performance over years by performing step drawdown test. The well used in this study was drilled by Neojen Engineering in the unconfined aquifer in Bursa Küçük Sanayi region and is 27 meters deep. The first step drawdown test was carried out on November 2, 2012. The test was repeated on March 23, 2017 in the same well. The step drawdown test data obtained from the field study were solved by the Hantush-Bierschenk and Rorabaugh analytical methods and the well performance parameters were obtained. The change in well efficiency and specific capacity were investigated between the dates of the two tests. Suggestions are presented to increase the well performance.

Anahtar Kelimeler

• Pumping well,Step drawdown test,Well efficiency

KADEMELİ POMPALAMA TESTLERİ İLE KUYU PERFORMANSININ ZAMAN İÇİNDE DEĞİŞİMİNİN İNCELENMESİ

Öz

Bu çalışmanın amacı, kademeli pompalama testi ile kuyu performansının yıllar içerisindeki değişimini incelemektir. Çalışmada Neojen Mühendislik tarafından Bursa Küçük Sanayi bölgesindeki basınçsız akiferde açılan 27 metre derinliğindeki kuyu kullanılmıştır. İlk olarak 2 Kasım 2012 tarihinde bir adet kademeli pompalama testi yapılmıştır. Kademeli pompalama testi, aynı kuyuda 23 Mart 2017 tarihinde tekrar yapılmıştır. Arazi çalışması sonucu elde edilen kademeli pompalama test verileri Hantush-Bierschenk analitik metoduyla çözülüp kuyu performans parametreleri elde edilmiştir. İki testin uygulandığı tarih arasında kuyu verimindeki ve özgül kapasitedeki değişim incelenmiştir. Kuyu performansının artırılması için öneriler sunulmuştur.

Anahtar Kelimeler

• Kuyu verimi,Kademeli pompalama testi,Pompaj kuyusu,Kuyu verimi

Kaynakça

1. Avcı C. B., Ciftci E., Sahin A. U. (2010). Identification of Aquifer and Well Parameters from Step-Drawdown Tests. Hydrogeology Journal. 18: 1591 – 1601. Doi: 10.1007/s10040-010-0620-2
2. Avcı C. B., Sahin A. U., Ciftci E. (2013). A New Method for Aquifer System Identification and Parameter Estimation. Hydrological Processes, 27, 2485–2497. Doi: 10.1002/hyp.9352
3. Bear J. (1979) Hydraulics of Groundwater, McGraw-Hill, New York, 569p.
4. Bierschenk, W. H. (1963) Determining Well Efficiency by Multiple Step-Drawdown Tests. International Association of Scientific Hydrology, 64:493-507.
5. Eden, R. N., Hazel C. P. (1973) Computer and Graphical Analysis of Variable Discharge Pumping Tests of Wells. Civil Engineering Trans., Inst. Engrs., Australia. pp. 5-10.
6. Eryılmaz, G. (2013). Kuyu Testlerine Dayalı Analitik ve Sayısal Yöntemlerle Akifer Hidrolik İletkenliğinin Belirlenmesi. Yüksek Lisans Tezi, Uludağ Üniversitesi, Bursa.
7. Hantush, M.S. (1964) Hydraulics of Wells, in: Advances in Hydroscience, V.T. Chow (editor), Academic Press, New York, pp. 281-442.
8. Huang, Y. C., Yeh H. D. (2007) The Use of Sensitivity Analysis in On‐Line Aquifer Parameter Estimation, J. Hydrol., 335, 406–418. Doi: 10.1016/j.jhydrol.2006.12.007

9. Jacob, C.E. (1947) Drawdown Test to Determine Effective Radius of Artesian Well. Transactions ASCE. V.112, pp. 1047-1070.
10. Jacob, C.E. (1950) Flow of Groundwater. In: Rouse H, editor. Engineering hydraulics. New York: Wiley: 321–86.
11. Kresic N. (2007) Hydrogeology and Groundwater Modeling. Second Edition. CRC Press, Taylor&Francis Group, 807pp.
12. Kruseman, G.P., de Ridder N.A. (1990) Analysis and Evaluation of Pumping Test Data. (2nd ed.), Publication 47, Intern. Inst. for Land Reclamation and Improvement, Wageningen, The Netherlands, 370pp.
13. Lennox, D.H. (1966) Analysis and Application of Step-Drawdown Tests. Journal of Hydraulics Div., ASCE. Hy. 6, pp.25-47.
14. Maréchal J.C., Ladouche B., Dörfliger N., Lachassagne P. (2008) Interpretation of Pumping Tests in a Mixed Flow Karst System. Water Resources Research. Vol: 44, W05401. Doi:10.1029/2007WR006288.
15. MWDOC (2012) Aquifer Pumping Test Analysis and Evaluation of Specific Capacity and Well Efficiency Relationships SL-1 Slant Well Doheny Beach, Dana Point, California, Technical Memorandum, Municipal Water District of Orange County.
16. MWDOC (2012) Aquifer Pumping Test Analysis and Evaluation of Specific Capacity and Well Efficiency Relationships SL-1 Slant Well Doheny Beach, Dana Point, California, Technical Memorandum, Municipal Water District of Orange County.
17. Polak, K., Klich J., Kaznowska K. (2011) The Method of Wells’ Efficiency Estimation. Mine Water-Managing the Challenges, pp. 153-157.
18. Polak, K., Klich J., Kaznowska K. (2011) The Method of Wells’ Efficiency Estimation. Mine Water-Managing the Challenges, pp. 153-157.
19. Rafini S., Chesnaux R., Ferroud A. (2017) A Numerical Investigation of Pumping-Test Responses from Contiguous Aquifers. Hydrogeology Journal. Vol: 25, Issue 3, pp 877–894. doi: 10.1007/s10040-017-1560-x
20. Rorabaugh, M.I. (1953) Graphical and Theoretical Analysis of Step-Drawdown Test of Artesian Wells. Proc. Am. Soc. Civ. Eng. Hyd. Div. v.19, no 1,pp. 362.1-362.23.
21. Sheahan, N.T. (1971) Type-Curve Solution of Step-Drawdown Test. Ground Water. v. 9, pp.25-29. Doi: 10.1111/j.1745-6584.1971.tb03528.x
22. Türkkan Eryılmaz, G., Korkmaz S. (2015) Kuyu ve Akifer Testlerine Uygulanan Analitik ve Sayısal Yöntemlerle Hidrolik İletkenliğin Belirlenmesi. Teknik Dergi, Cilt 26 Sayı 1. Pp 6969-6991.
23. Zhang M., Tong L. (2018) Characterization of Barrier Effect of Underground Wall in Pumping Tests. 2nd International Symposium on Asia Urban GeoEngineering. Pp 155-163. Doi: 10.1007/978-981-10-6632-0_12
24. Zhanga Y., Lia M.,Wanga J. ,Chena J., Zhub Y.(2017) Field Tests of Pumping-Recharge Technology for Deep Confined Aquifers and Its Application to A Seep Excavation. Engineering Geology. Vol.: 228, Pp 249-259. Doi: 10.1016/j.enggeo.2017.08.019