Civil Engineering / İnşaat Mühendisliği
Permanent URI for this collectionhttps://hdl.handle.net/11147/13
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Conference Object Importance Of Gördes Dam For Izmir Metropolitan City(İZSU, 2017) Şahin, Yavuz; Tayfur, Gökmen; Baba, AlperIzmir is a metropolitan municipality which is the third the most populated city with 4.223.545people in 2016. Fiftysix percent of the drinking water of İzmir city is provided from groundwater resources. The rest comes from Tahtalı and Balçova Dams. The population and water consumption of the city increase each year. Although Gördes dam in Gediz Graben was constructed in between 1998 and 2004 by the Turkish State Hydraulic Works (DSİ), it could not store the water due to geological problems like leaching. Most recently, these problems were solved and the dam will start storing water. The storage capacity of the dam is 448.46 hm3. It is planned to provide for the annual average of 59.00 hm3 for the domestic uses of İzmir Metropolitan Region and for the irrigation of 14,809 hectares areas in Akhisar Plain.Conference Object Groundwater Pollution by Nitrate From Agricultural Fertilizers: the Case of Menemen Basin (aegean Region, Turkey)(İZSU, 2017) Gören, Ayşegül Yağmur; Genişoğlu, Mesut; Balcı, Esin; Ökten, Hatice Eser; Baba, AlperGroundwater is an essential drinking water source in Menemen subbasin of İzmir city, Turkey. The aim of this study was to investigate the groundwater contamination by nitrates of agricultural lands. For this purpose, we evaluated variations of groundwater pH, redox potential, electrical conductivity (EC), major anions (NO3, Cl, SO4, HCO3 and CO3) and cations (Na, K, Ca and Mg). A statistical correlation procedure and piper diagram for hydrogeochemistry of groundwater were also applied. Nitrate levels were found to be higher around agricultural areas. Also EC values and Cl were measured to be higher as proximity to coastal areas increased, indicating seawater intrusion. Agricultural activities and excessive freshwater withdrawal were shown to impair groundwater quality and quantity at Menemen subbasin.Conference Object Effect of Urbanization on Groundwater Resources of Izmir City(İZSU, 2017) Baba, Alper; Yazdani, Hamidrezaİzmir is the third largest city in Turkey. Fiftysix percent of the drinking water of İzmir city is provided from groundwater resources. Halkapınar (located on Bornova Plain) is one of the important groundwater resources areas. This region is providing 16 % of İzmir drinking resources. The water withdraws from the Halkapınar wells is about 30 million m3 in recent years. The groundwater levels of Bornova plain are range from 1 m to 10m. This plain had been used as agricultural lands until the 1950s, while today they have been opened for settlement. In 1965 Bornova accommodated half of its population in rural areas after receiving so much immigration. It was inevitable to open the citycentre to housing and to consider the surrounding village areas as urban areas. By the year 2000, the rural population had already been melted into the urban population. The agricultural areas in rural parts of the country will have completely disappeared in 50 years' time. Much of the surface of the plain is rendered impermeable by buildings, roads and surface coverings. Because of this covering, groundwater recharge is reduced and increases and accelerates runoff the plain. The groundwater recharge from precipitation was about 27 % in 1925, but this amount dropped to 13% in 2012. Groundwater recharge from precipitation will be 1% in 2030. Hydrodynamic of plain is change because of excessive urbanization. Groundwater level of the plain still high because tall building makes a barrier for groundwater recharge points.