Polysphinctini and Pimplini (Hymenoptera: Ichneumonidae: Pimplinae) from the Thrace region of Turkey /// This study is a part of PhD’s thesis accepted on 1.03.2004 by Trakya University Institute of Science.

2005 ◽  
Vol 48 (1) ◽  
pp. 63-72 ◽  
Author(s):  
Murat Yurtcan ◽  
Ahmet Beyarslan
Keyword(s):  
Author(s):  
Nuray Can ◽  
Ebru Tastekin ◽  
Tulin Deniz Yalta ◽  
Necdet Sut ◽  
Selma Korkmaz ◽  
...  

Author(s):  
Recep Cakir

The article contains data obtained from evaluations related to irrigation water use efficiency (IWUE) and water use efficiency (WUE), for the main crops, irrigated at different stages of growth, on the basis of some findings obtained in the Research Institute in Kırklareli. Each of the experimental crops was sown and farmed following procedures applied by the farmers in the region, except of the irrigation applications which were based on the sensitivity of a certain crop to water shortage in the soil, during the specific growth stages. Similar procedures were applied and all the experimental treatments were irrigated at growth stages, as predicted in the research methodology, and water amounts required to fill the 0-90 cm soil depth to field capacity were implied. Evaluation data obtained from the field experiments with three major crops, grown on the non-coastal lands of Thrace Region showed, that the productivity of irrigation water, as well as water use efficiencies of all analysed crops, are growth stage controlled. The highest IWUE and WUE efficiencies of 0.87 and 0.92 kg da-1 m-3; and 1.08 kg da-1 m-3 and 0.81 kg da-1 m-3; were determined for wheat and sunflower crops, irrigated at booting and flowering stages, respectively. Each m3 of irrigation water, applied during the most sensitive fruit formation stage (Ff) of pumpkin crop, provided additionally 8.47 kg da-1 fruit yield, 8.09 fruit numbers and 0.28 kg da-1 seed yields, more than those of rainfed farming (R).


2014 ◽  
Vol 60 (4) ◽  
pp. 335-340 ◽  
Author(s):  
Yasar Keskin ◽  
Murat Dincer Cekin ◽  
Hakan Gunduz ◽  
Nimet Emel Luleci ◽  
Esra Giray ◽  
...  

Author(s):  
Murat Olgaç KANGAL ◽  
Mustafa ÖZER ◽  
Fırat BURAT ◽  
Soner AKIN
Keyword(s):  

2016 ◽  
Vol 33 (6) ◽  
pp. 589-593
Author(s):  
Nese Ozkayin ◽  
Gokce Ciplak ◽  
Ufuk Usta ◽  
Hakan Genchellac ◽  
Osman Temizoz
Keyword(s):  

2021 ◽  
Author(s):  
Tohid Nozadkhalil ◽  
Semih Ergintav ◽  
Ziyadin Cakir ◽  
Ugur Dogan ◽  
Thomas R. Walter

<p>Westward migration of M>7 earthquakes along North Anatolian fault with the latest one, Izmit 1999 event, led focus of studies to the seismic gap in the main Marmara fault. For this purpose, the coastal ranges of the Marmara Sea, mainly Istanbul megacity, are renowned for earthquake and ground motion hazards, associated with faulting, landslides and sediment compaction processes. Ground motion associated with man-made activities, however, have been barely studied. The Thrace region of Turkey, some 50 km to the North of the Marmara Sea, expresses pronounced ground motions affecting large areas. We use the Persistent InSAR technique to monitor the Marmara region using Sentinel-1 satellites’ TOPSAR data between 2014 and 2020. Results for both ascending (T131 and T58) and descending (T36) tracks reveals 10 mm/yr rate of subsidence in the Thrace region of Turkey, affecting an area ~15400km² with dimensions of ~110 km by ~140 km. There are two plausible mechanisms for this deformation; (1) excessive pumping of groundwater for agricultural purposes, or (2) natural gas extraction activities taking place in the region. To better understand the observed deformation source, as a first step, we model potential gas extraction by volume change. No piezometric data are available for this region for the time being. Thick sediments including sandstone, reefal carbonates, amongst others, are aimed for gas exploration in the Thrace basin for more than half century. Depth of gas extraction wells and sediment thickness is compiled from previous studies to compare the subsided area with sediment and well depth variations. </p><p>We use  the Poly3D boundary element method to model the surface. Poly3D uses planar triangular elements of constant model to model displacement’s source. Using triangular elements provides models with complex and smooth 3D surfaces avoiding overlaps or gaps, and hence allowing one to construct realistic models. Poly3dinv inverse model applies a fast non-negative/non-positive least squares solver to optimize the solution. We construct a surface enveloping tips of the wells and use it to produce deformation at surface due by allowing opening on it. Small residuals between the observation and model based on opening suggests that deformation is likely caused by natural gas extraction.</p>


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