TY  - JOUR
T1  - Augmenting in situ lake level measurements with Earth observation satellites
TT  - Augmenting in situ lake level measurements with Earth observation satellites
AU  - Tekeli, Ahmet Emre
PY  - 2018
DA  - November
DO  - 10.18400/tekderg.341316
JF  - Teknik Dergi
PB  - UCTEA Turkish Chamber of Civil Engineering
WT  - DergiPark
SN  - 1300-3453
SP  - 8675
EP  - 8689
VL  - 29
IS  - 6
LA  - en
AB  - In here, Ice, Cloud and Land ElevationSatellite (ICESat) altimeter data were used with MODIS snow cover maps todetermine Akşehir Lake/wetland water levels which dried up in 2008. Since thewater level dropped below the gage in 2004, the ICESAT-MODIS (ICEM)-based lakewater levels could not be compared with gage levels. Instead, combined use ofLandsat-based lake surface area studies and Akşehir Lake bathymetry (LAB)enabled ICEM assessment. ICEM and LAB differences are between -0.09m and 0.32mand close to the standard deviations (s.d.) of pure ICESat-based studies(0.02m-0.27m). The minimum and maximum water surface elevation changes of ICEMbetween consecutive winter and spring are 0.30m and 1.35m and are in thehistorical range. ICEM showed highest s.d. during October 2005, when the windvelocities were highest.
KW  - ICESat
KW  - GLA14
KW  - laser altimeter
KW  - Akṣehir Lake
KW  - Water level
KW  - MODIS
KW  - Landsat
N2  - Bu çalışmada, Ice, Cloud andLand Elevation Satellite (ICESat) altimetre verileri, 2008 yılında kurumuş olanAkşehir Gölü (AG)'nün su seviyelerini tespiti için MODIS kar örtüsü haritalarıile birlikte kullanılmıştır. AG’deki su seviyesi, 2004 yılında eşel seviyesininaltına düştüğü için, eşel ve ICESat-MODIS (ICEM) tabanlı göl su seviyeleri birebir karşılaştırılamamıştır. Landsat tabanlı göl yüzey alanı çalışmaları ile AGbatimetrisinin (LAB) birlikte kullanılması, ICEM tabanlı su seviyelerinindeğerlendirilebilmesine imkan sağlamıştır. ICEM ve LAB arasındaki farklar-0.09m ve 0.32m olup, sadece ICESat tabanlı çalışmaların standart sapması olan0.02m ila 0.27m değerlerine yakın olduğu görülmüştür. ICEM'in ardışık kış veilkbahar mevsimleri arasında hesaplanan minimum ve maksimum suyu seviyesideğişiklikleri 0.30m ve 1.35m olarak tarihsel gözlem aralığındadır. ICEM suseviyeleri, Ekim 2005'te rüzgar hızlarının en yüksek olduğu süre boyunca enyüksek standart sapmaları göstermiştir.
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UR  - https://doi.org/10.18400/tekderg.341316
L1  - https://dergipark.org.tr/en/download/article-file/565524
ER  -