Estimation of hydraulic conductivity from specific capacity data for alluvial aquifer: A case study from Alaşehir Plain (Manisa)

71.Türkiye Jeoloji Kurultayı, 23-27 Nisan 2018, AnkaraAkiferlerin hidrolik iletkenliği, transmissibilitesi ve depolama katsayısı gibi hidrolik parametrelerinin pompaj kuyuları ile belirlenmesi oldukça zor ve pahalı bir işlemdir. Hidrolik iletkenliğin belirlenmesinde, debi, statik seviye, dinamik seviye ve etki yarıçapına ihtiyaç duyulmaktadır. Gözlem kuyuları olmadığı takdirde etki yarıçapı global rakamlarla ifade edilmektedir. Buna karşılık, statik su seviyesi, dinamik su seviye ve kuyu debisi kolaylıkla kuyu başında ölçülebilmektedir. Bu veriler ile kuyunun özgül debisi rahatlıkla hesaplanabilmektedir. Ülkemizde, binlerce su kuyusu alüvyon akiferde açılmaktadır. Kuyuların hidrolik parametreleri ise pompaj testlerinin uygulanamaması nedeni ile bilinmemektedir. Bu çalışma kapsamında ise hidrolik iletkenliğin bölgede aynı akiferden elde edilen özgül debi değerleri ile tahmin edilebilmesine gidilmiştir. Bu çalışma Alaşehir Ovası’nın en önemli yeraltı suyu akiferi olan alüvyon akiferde uygulanmıştır. Büyük miktarda çekilen yeraltısuyu çalışma alanında içme ve sulama amaçlı kullanılmaktadır. İnceleme alanında 120-150 m derinliğinde açılmış olan su kuyularından 5-30 L/s debi ile yeraltı suyu çekilebilmektedir. Açılan bu kuyularda çok az kullanılabilecek hidrolik parametre bulunmaktadır. Bu nedenle, kuyuların hidrolik parametrelerinin belirlenmesinde bilinen parametrelerden yola çıkarak bilinmeyeni tahmin eden yaklaşımlara ihtiyaç duyulmaktadır. Bu verilerden yola çıkarak, çalışma alanında düzgün verisi olan ve alüvyonda açılmış kuyu özgül debi değerleri ile kuyunun hidrolik iletkenliğinin belirlenmesine çalışılmıştır

Investigation of groundwater recharges mechanism in Alasehir plain: From physical characterization to modelling

IWA 2nd Regional Symposium on water, wastewater and environment, 22-24 March 2017, Cesme, İzmirCharacteristics of aquifer that allows the flow of groundwater, recharge and discharge mechanism effect the available groundwater potential. In order to determine the available potential of groundwater, the budget components are the most important parameters. In general, different analogical methods are applied in different countries, instead of using measurable data. Determination of the groundwater recharge is the most difficult parameter to be measured among the hydrological budget parameters. In general, the analogical methods are insufficient to determine the groundwater recharge rate. Precipitation, evaporation-transportation and runoff can be measured from the surface meteorological station. However, estimation of groundwater recharge cannot be measured directly. At the moment of climate change, visualization of the spatial distribution of the groundwater recharge estimation and mapping are needed. Therefore, improvements of easy groundwater recharge techniques are very important tools for groundwater basins to develop the water management planning.The Scientific and Technological Research Council of Turkey (TUBITAK), project no. 115Y06

Power generation from geothermal resources in Turkey

This study provides information on power generation via geothermal resources and sector development. The first instance of power generation from geothermal resources was performed by a state-owned power plant at Kaildere-Denizli, whereas the first private sector investment was the Dora-1 power plant, commissioned in 2006. Legislation regulating rights ownership and certification laws was issued in 2007. The installed capacity of the geothermal resources is 311.871 MW for 16 power plants, and power generation licenses were issued for 713.541 MW at the end of 2012. The total potential geothermal power that can be generated in Turkey is estimated to be approximately 2000 MW. The geothermal fields in Turkey produce high levels of greenhouse gases, which have been deemed highly responsible for global warming. Due to high CO2 emissions, the geothermal energy sector risks a carbon tax in the near future. For certain geothermal resources, multiple investors produce electricity from the same resource. The sector will inevitably experience severe damage unless permanent solutions are devised for problems related to sustainably managing geothermal resources and environmental problems. (C) 2014 Elsevier Ltd. All rights reserved

Optimization of downhole pump setting depths in liquid-dominated geothermal systems: A case study on the Balcova-Narlidere field, Turkey

Downhole pumps are being used increasingly more often in low-enthalpy geothermal wells. The depth at which these pumps are installed depends on the physical and chemical characteristics of the geothermal fluid, the production flow rate, and the reservoir pressure and permeability. In this study we have investigated the factors affecting pump setting depths in low-temperature, liquid-dominated geothermal systems and defined the relationship between flow rate and pressure drawdown based on multi-rate test results. The methodology proposed was applied to the Balcova-Narlidere geothermal field, Turkey. It was found that the most important parameters for determining the capacity and setting depth of a downhole pump were flow performance, non-condensable gas concentration, and temperature. The implementation of the methodology is illustrated. (C) 2007 CNR. Published by Elsevier Ltd. All rights reserved