- Research in Agricultural Sciences
- Vol: 9 Issue: 2-3
- TORTUM GÖLÜ SU TOPLAMA HAVZASINDA SEDİMANTASYON SORUNU VE KONTROLÜ ÜZERİNDE BİR ARAŞTIRMA
TORTUM GÖLÜ SU TOPLAMA HAVZASINDA SEDİMANTASYON SORUNU VE KONTROLÜ ÜZERİNDE BİR ARAŞTIRMA
Authors : Yusuf Z. Güresinli
Pages : 0-0
View : 10 | Download : 5
Publication Date : 2010-12-29
Article Type : Research
Abstract :ÖZET Şiddetli erozyon etkisi altmda bulunan Tortum gölü su toplama havzasında sedimatasyon sorımu ve kontrolü üzerinde yapılan bu araştırma havzasının gözlem süresine ait yıllık su potansiyeli ile toplam sediment taşınım miktarı saptanmıştır. Ayrıca hidrolojik verilerin değerlendirilmesi açısından havzadaki önemli dereler için taşkın-tekerrür analizleri yapı/arak elde edilen sonuçlar uygulama yonünden tattışı/mıştır. Havza karakteristiklerinin sedimantasyon üzerindeki etkilerininbelirlenmesi için havzanın jeolojik yapısı toprak dağılımı şimdiki arazi kullanımı ye topoğrafik yapm ile meCra özelliklefi de incelenmiılir. SUMMARY ARESEARCH ON THE SEDIMENTATION PROBLEM AND CONSERVATION OF TORTUM LAKE WATERSHED. This study is conducted in Tortum lake watershed which is under severe erosion. To determine the extent of sedimentation and to give same recommeudations for the future land use to slow the erosion. This watershed is on the northeast of Erzurum. Reseacrh area İs very steep and covers the whole watershed having on catchment area of 1792 km2. An observation post is located near the willage of Dikyar on theTortum river and flow measurement taken for the years of 1974, 1975 and 1976 by hydrometrie methods together required hydrologic data for the recIamation of the watershed. Stage-discharge curves of the Tortum river for each observation year were plotted by using the data taken from tht; observation post and water potentiaI is caldulated by these curves. The mea-n annua( flow varied 6-8 m3/sec the basin yield 4-6 lt/sec/km2 and total annual now 196. 106-257.10 6 m3 for the duration of the reseacrh. Expected mean flood discharge of 82 m3/sec is being the proof of the very high erosion and sedimentati on. Estimate the total amount of sediment transported fro!J1 the basin. Suspanded sediment samples are taken from the river by dept-integration method. on the placeı where flow measurements are taken. A suspended sediment-rating curve ıs determined from the relation between mean daily dischargeı and mean daily sediment for the dı;ıration of measurements done in the water years of 1974, 1975 and 1976. Total amoiınt of sediment carried from the drainage basin of 1457 km2 up from the place where- the measurehıents were taken was found as 3,695.10,6 ton/year (1, 759.10 6 m3/year) by using the method suggested by Miller (1951), analysis of flow-duration and sediment rating curve together. The method developed by Meyer-Peter and Müller (1948) for the estimation of bed-load is appIiestimated annual bed-Ioad which in the 16 %of suspended sedim'ent. Total sediment carried from the basin is calculated as 1,9.106 m3 and arerage annual sedİment produçtion rate ıs 2,9.10 3 ton/km2. Those factors having an important role on the sediment produçtion such as geology, distribution of soils and topography of the basin and' characteristics of the stream bed are studied' to determine the effects of the basin features on the sedimentation. Erosion control could deerease the damage of sedimentation. Hence the investments done by state and agricultural land would be protected agaİnst floods. The filling of the lake by sediments alsa wi'll be ,prevented up to a certain degree. Socio-economic problems of this reqion should be solved to be able to reclaim the nnprodnctive land and to prevent the floods. Reforesting of the former forest areas should be first consideration; to aChiere this objective, state organizations and local pıiblic should be tranied and urged for replanting. Restoration of the meadows is also another important subject, For this purpose npper basin should be considered first.Keywords :