“…Authors indicated that surface areas of 15 lakes had decreased while areas of 9 lakes had increased from 2001 to 2016. Yapiyev et al (2019) estimated water storage changes in small endorheic lakes in Northern Kazakhstan and they documented that total water surface area of the lakes reduced 7% from 1986 to 2016 although surface area of some smaller lakes had increased.…”
Section: Figure 2 Temporal Change In Water Surface Areamentioning
confidence: 99%
“…Monitoring of spatial and temporal changes using satellite images has globally become crucial for better understanding and explaining of environmental changes in the reservoirs. Spatial and temporal changes of water surface in lakes and reservoirs were monitored by several scientists (Sidle et al, 2007;El-Asmar et al, 2013;Abu-Faraj et al, 2014;Hossen et al, 2018;Ji et al, 2018;Tan et al, 2018;Yapiyev et al, 2019). There are few researches on change monitoring of water surface in lakes and reservoirs in Turkey (Akar et al, 2002;Reis and Yılmaz, 2008;Durduran, 2010;Avdan et al, 2013;Bahadır, 2013;Battal et al, 2016;Erener et al, 2016;Yücel and Turan, 2016;Sarp and Ozcelik, 2017;Topuz and Karabulut, 2018).…”
Spatial and temporal changes in surface area of Atikhisar Reservoir were monitored by using remote sensing and geographic information system techniques from 1975 to 2017. Satellite images were processed, analysed and manually digitized to reveal the changes in surface area of the reservoir. The results showed that total surface area of the reservoir was ranged between 1.72km 2 and 3.84km 2 during the monitoring period. Maximum increase in the surface area has been observed with 74.6% while maximum decrease has been observed with 31.8%. These fluctuations could be related with the climatic changes, natural and man-made processes such as sediment transportation, water leakages, excessive water exploitation for drinking, domestic or agricultural purposes, and human interventions along the reservoir. Therefore, surface area should be monitored continuously and all factors influencing the variation in surface area should be considered in decision making processes to support water sharing policy toward the management of water resources.
“…Authors indicated that surface areas of 15 lakes had decreased while areas of 9 lakes had increased from 2001 to 2016. Yapiyev et al (2019) estimated water storage changes in small endorheic lakes in Northern Kazakhstan and they documented that total water surface area of the lakes reduced 7% from 1986 to 2016 although surface area of some smaller lakes had increased.…”
Section: Figure 2 Temporal Change In Water Surface Areamentioning
confidence: 99%
“…Monitoring of spatial and temporal changes using satellite images has globally become crucial for better understanding and explaining of environmental changes in the reservoirs. Spatial and temporal changes of water surface in lakes and reservoirs were monitored by several scientists (Sidle et al, 2007;El-Asmar et al, 2013;Abu-Faraj et al, 2014;Hossen et al, 2018;Ji et al, 2018;Tan et al, 2018;Yapiyev et al, 2019). There are few researches on change monitoring of water surface in lakes and reservoirs in Turkey (Akar et al, 2002;Reis and Yılmaz, 2008;Durduran, 2010;Avdan et al, 2013;Bahadır, 2013;Battal et al, 2016;Erener et al, 2016;Yücel and Turan, 2016;Sarp and Ozcelik, 2017;Topuz and Karabulut, 2018).…”
Spatial and temporal changes in surface area of Atikhisar Reservoir were monitored by using remote sensing and geographic information system techniques from 1975 to 2017. Satellite images were processed, analysed and manually digitized to reveal the changes in surface area of the reservoir. The results showed that total surface area of the reservoir was ranged between 1.72km 2 and 3.84km 2 during the monitoring period. Maximum increase in the surface area has been observed with 74.6% while maximum decrease has been observed with 31.8%. These fluctuations could be related with the climatic changes, natural and man-made processes such as sediment transportation, water leakages, excessive water exploitation for drinking, domestic or agricultural purposes, and human interventions along the reservoir. Therefore, surface area should be monitored continuously and all factors influencing the variation in surface area should be considered in decision making processes to support water sharing policy toward the management of water resources.
“…Central Asia is the region of the world with the most endorheic (i.e. closed) river basins with several thousand lakes (Aizen et al 2007;Yapiyev et al 2019;Yapiyev et al 2017). The geographical region of Central Asia largely consists of dryland areas.…”
Anthropogenic activities and climate change contribute to the deterioration of wetlands worldwide with Central Asia (CA) being among the regions which are most severely affected. This study examined how the distribution of wetlands in CA has changed in the last two decades. Emphasis was put on inland wetlands protected as International Bird and Biodiversity Areas. Time series of maps of wetlands (i.e. reed beds) were created for the
“…It was shown that the spatial distribution and inter-annual variability of surface water bodies in the continental climate of Kazakhstan are affected by the impacts of climatic factors [5]. Precipitation and temperature are two dominant climatic factors that affect the spatial distribution and changes in water mass [6]. In many areas, climate change is likely to impact on decreasing trends in water mass [7].…”
Section: Introductionmentioning
confidence: 99%
“…The climate on Alakol Lake is a continental climate, with very cold snowy days in winter but very hot and dry weather in summer. Mean annual temperature and precipitation are 6.2-7.2 • C and 152.9 mm (Tables S1 and S2-Supplementary material) [6]. The maximum and average depth of the lake is 54 and 22 m [19].…”
Alakol Lake is one of the largest hydrologically closed lake located in Balkash-Alakol River Basin in southeast Kazakhstan. Having a coastline approximately at 490 km, Alakol Lake has faced multiple threats due to both natural and anthropogenic factors as a result of tectonic movements, geology, wind-wave conditions, growing tourism activities, fishing, and transport, etc. The present study aims to investigate the historical trends in coastline changes along Alakol Lake in Kazakhstan and estimate its change rate by using remote sensing data in particular scale-space images Landsat-5 TM, 7 ETM+, 8 OLI, and Sentinel-2A. Based on Landsat and Sentinel data, the modified normalized difference water index was calculated to demonstrate the coastline changes along Alakol Lake between 1990 and 2018. Moreover, the monitoring and analysis of coastline dynamics is based on the main morphometric characteristics of Alakol Lake including water surface area, coastline length, geomorphology of the coast, etc. Our results reveal that there is a continuous coastline retreat, depending on the coast types. For example, in the case of the denudation coasts, a land inundation was from 120 to 270 m between 1990 and 2018. In the case of the accumulative coast (mainly northeast, north, and northwest coasts) a land inundation was from 200 to 900 m. A vast area of agricultural land around Alakol Lake become flooded and lost. This study demonstrates the importance of monitoring coastline dynamics because it provides essential information for understanding the coastal response to contemporary nature and anthropogenic impacts.
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