Journal of Biological and Environmental Sciences

Permanent URI for this communityhttps://hdl.handle.net/11452/16880

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Assessment of some pollution parameters with geographic information system (GIS) in sediment samples of Lake Uluabat, Turkey
(Uludağ Üniversitesi, 2014-04-08) İleri, Saadet; Karaer, Feza; Katip, Aslıhan; Onur, S. Sonay; Aksoy, Ertuğrul; Ziraat Fakültesi; Toprak Bölümü
The scope of work is to determine the quality of the lake Uluabat sediment. pH, electrical conductivity (EC), orthophosphate phosphorus (PO4-P), total phosphorus (TP), ammonium nitrogen (NH4-N), nitrate nitrogen (NO3-N), total nitrogen (TN), organic matter, and water content were monitored from June 2008 to May 2009 monthly with the samples taken from 8 different stations in the lake. Additionally sediment quality parameters were mapped to the ArcGIS 9.1 software and distribution of pollution were visualized with pollution distribution maps. As a result, in the stations 1., 5., 7., 8. have been found to be more intense pollution load when these maps were examined.
Characterization, classification and agricultural usage of vertisols developed on neogen aged calcareous marl parent materials
(Uludağ Üniversitesi, 2007-04-01) Özsoy, Gökhan; Aksoy, Ertuğrul; Ziraat Fakültesi; Toprak Bölümü
Vertisols that strongly influenced by argillipedoturbation, contain high levels of plant nutrients and well productive when irrigated. However, owing to their high clay content, they are not well suited to cultivation without painstaking management. The aim of this research was to determine physical, chemical and morphological properties and classification of the Vertisols formed on neogene clay lime deposits under intensive agricultural actives in the Bursa province which is the fourth most industrialized and populated city in Turkey. Vertisols comprise 23.693 hectares or 2,1 percent of the land area of Bursa Province. Most of the Vertisols are under the rain-fed agriculture practices and cereals (wheat and barley), tobaccos, and sunflowers are the most important cash crops. Some of them are irrigated for horticultural crops (tomato, pepper and onion) and sugar beets production. According to findings from preliminary field-works and the existing maps and reports, eleven different soil profiles formed on the neogene aged calcareous marl parent materials were described and sampled. All studied Vertisols are found to be generally deep, dark colored with strong wedge-shaped structure, high in CEC and base saturation with calcium and magnesium occupying more than 90 percent of the exchange site, low organic material and have sufficient amounts of nutrients for crops. The agricultural potential of the soils were also found to be limited due to high clay and CaCO3 contents of sub surface horizons, steep slopes and a hard pan formation due to inappropriate soil tilling. On the basis of morphological and physicochemical analysis, soil profiles were classified as a Typic and Chromic Haploxerert according to Soil Taxonomy (Soil Survey Staff, 1975 and 1999) and as an Eutric Vertisol according to FAO/Unesco Soil Map of the World Legend (FAO/Unesco, 1974 and 1990) classification systems.
A GIS-based method for shallow lake eutrophication assessment
(Uludağ Üniversitesi, 2011) Akdeniz, Serkut; Karaer, Feza; Katip, Aslıhan; Aksoy, Ertuğrul; Mühendislik ve Mimarlık Fakültesi; Çevre Mühendisliği Bölümü
Because of the rapidly increasing pollution in Lake Uluabat, which is one of the significant shallow lakes of Turkey and has been announced to be a Ramsar Area, eutrophic state evaluation based on geographic information system was performed. The eutrophication level of the lake is determined with the help of a 0 – 100 scale based on TSI calculations and secchi disc depth (SD), chlorophyll-a (Chl-a), total phosphorus (TP) and total nitrogen (TN) parameters. Between 0 - 30 represents oligotrophic level, 30 – 40 represents lower mesotrophic level 40 – 50 mesotrophic, 50 – 60 upper mesotrophic, 60 – 70 eutrophic, 70 – 80 hypereutrophic and 80 – 100 extremely hypereutrophic. The TSI maps of four parameters were created using the Inverse Distance Weight (IDW) interpolation method. The final map showing the spatial distribution of trophic level was generated by synthesising the thematic maps of each indicator on the cell basis with the overlay technique. From the final map, the trophic level of the entire lake was characterised as eutrophic or more in all seasons studied during the year.
Remote sensing and gis applications for monitoring multi- temporal changes of natural resources in Bursa-Turkey
(Uludağ Üniversitesi, 2009) Dirim, M. Sabri; Aksoy, Ertuğrul; Özsoy, Gökhan; Ziraat Fakültesi; Toprak Bilimi Bölümü
The main objective was to investigate multi-temporal changes of the natural resources using remote sensing and geographic information system techniques. Landsat5 TM full frame images of 16 June 1984 and 06 August 1998 were used in this study. For this aim, three sub-scenes covering the Bursa city built-up area, Uluabat Lake and Mount Uludağ and its surroundings were extracted from the images. Geometric correction and image enhancement were made for the comparison time series remote sensing data, exact image-on-map overlay and better visual interpretation. Boundary of the Bursa City built-up area and Uluabat Lake was produced from visually interpreted image using both screen and tablet digitizing. Biomass changes of the Mount Uludağ and its surroundings were gathered from normalized vegetation index classification. The results revealed that the Bursa City built up areas have been expanded at a rate of 142.5 % from 5089 hectares (in 1984) to 12343 hectares (in 1998). The expansions in the built-up areas have been mainly occurred in valuable agricultural lands. In addition, the coverage area of the Uluabat Lake decreased at a rate of 12 % from 133.1 km2 ( in 1984) to 116.8 (in 1998) km2 due to sediments transported by the surface water of surrounding irrigated agricultural lands, tributary streams and mainly Mustafakemalpaşa River. Moreover, we found that 26292 ha mainly forest and floral areas have been degraded in fourteen years period.

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