scholarly journals Changes in the surface area of lakes in the Gwda River basin

2015 ◽  
Vol 14 (3) ◽  
pp. 121-129
Author(s):  
Kubiak-Wójcicka Katarzyna ◽  
Izabela Lewandowska
Keyword(s):  
Twentieth Century ◽  
Surface Area ◽  
River Basin ◽  
Water Surface ◽  
General Trend ◽  
Topographic Maps ◽  
Lake Surface ◽  
Water Surface Area ◽  
Starting Point ◽  
Lake Surface Area

Abstract This paper presents lake surface area changes that have taken place in the Gwda River basin. The studies were conducted on the basis of the cartographic materials released since the beginning of the twentieth century until the present times. The starting point was the area of all lakes greater than 1 ha which are present on the MPHP map from 2010. The assessment of the changes in the surface area of lakes in the Gwda River basin during approximately the last 100 years was possible thanks to the use of German topographic maps, so called Messtischblatt, at a scale of 1: 25 000 released between 1919 and 1944. The area of all the studied lakes has decreased by 465.09 ha (from 12783.62 ha at the beginning of the twentieth century to 12318.53 ha at the present time). Despite the general trend of lake atrophy, in particular cases one may observe an increase in the water surface area. This is the result of hydrotechnical works leading to river and lake damming, which in turn hampers the pace of atrophy.

scholarly journals Changes in the water surface area of Lakes Udzierz and Mątasek in the light of cartographic materials

2012 ◽  
Vol 12 (4) ◽  
pp. 169-177 ◽  
Author(s):  
Andrzej Fabich ◽  
Monika Kwidzińska
Keyword(s):  
Surface Area ◽  
Water Surface ◽  
Anthropogenic Impact ◽  
Average Rate ◽  
Topographic Maps ◽  
Lake Surface ◽  
Water Surface Area ◽  
Lake Surface Area ◽  
The One ◽  
Lake Waters

AbstractThe paper presents the changes in the water surface area of Lakes Udzierz and Mątasek located in the headwaters of the catchment of the River Mątawa (tributary of the River Vistula). The assessment of the rate of changes was based on Polish and German topographic maps as well as orthophotomaps. The analysed lakes turned out to be two of the fastest disappearing Polish lakes. In the last century (1910-2010) the water surface area of Lake Udzierz decreased from 148.87 to 69.60 ha and that of Lake Mątasek from 29.5 to 0.64 ha. The average rate of loss of the lake surface area during this period was from 0.53 to 0.98% per annum. Such drastic morphometric changes in the studied lakes are, on the one hand, mainly due to poorly conducted drainage and, on the other hand, the eutrophication of the lake waters intensified by the anthropogenic impact.

scholarly journals Changes in Water Surface Area of the Lake in the Steppe Region of Mongolia: A Case Study of Ugii Nuur Lake, Central Mongolia

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1470
Author(s):  
Erdenesukh Sumiya ◽  
Batsuren Dorjsuren ◽  
Denghua Yan ◽  
Sandelger Dorligjav ◽  
Hao Wang ◽  
...  
Keyword(s):  
Surface Area ◽  
Global Climate Change ◽  
Lake Water ◽  
Water Surface ◽  
Global Climate ◽  
Lake Surface ◽  
Central Mongolia ◽  
Water Surface Area ◽  
Annual Evaporation ◽  
Lake Surface Area

The Ugii Nuur Lake is not only one of the small hydrologically closed lakes located in the Orkhon River Basin in Central Mongolia but also the most vulnerable area for global climate change. Therefore, this study aims to investigate the impacts of recent global climate change on the water surface area. The data we analyzed were various measured hydro-meteorological variables of the lake basin and the lake surface area, which was estimated from Landsat series satellite data from 1986 to 2018. The methods we used were Mann-Kendall (MK), Innovative trend analysis method (ITAM), Sen’s slope estimator test, correlation, and regression analysis. The variation of lake water surface area has a strong positive correlation with the change of the lake water level (r = 0.95). The Mann-Kendall trend analysis has indicated that under a significant decrease in total annual precipitation ( Z   = −0.902) and inflow river discharge ( Z   = −5.392) and a considerable increase in total annual evaporation ( Z = 4.385) and annual average air temperature ( Z   = 4.595), the surface area of the Ugii Nuur Lake has decreased sharply ( Z = −6.021). The total annual evaporation (r = −0.64) and inflow river discharge (r = 0.67) were the essential hydro-meteorological factors affecting the surface area of the Ugii Nuur Lake. The lake surface area decreased by 13.5% in 2018 compared with 1986. In the near future, it is vital to conduct scientific studies considering the volume of lake water, groundwater, and the anthropogenic impact.

scholarly journals Simulation of hydrological processes in the Zhalong wetland within a river basin, Northeast China

2013 ◽  
Vol 17 (7) ◽  
pp. 2797-2807 ◽  
Author(s):  
X. Q. Feng ◽  
G. X. Zhang ◽  
Y. Jun Xu
Keyword(s):  
Surface Area ◽  
River Basin ◽  
Northeast China ◽  
Water Surface ◽  
Anthropogenic Activities ◽  
Swat Model ◽  
Water Volume ◽  
Efficiency Coefficient ◽  
Zhalong Wetland ◽  
Water Surface Area

Abstract. Zhalong National Nature Preserve is a large wetland reserve on the Songnen Plain in Northeast China. Wetlands in the preserve play a key role in maintaining regional ecosystem function and integrity. Global climate change and intensified anthropogenic activities in the region have raised great concerns over the change of natural flow regime, wetland degradation and loss. In this study, two key hydrologic components in the preserve, water surface area and water volume, as well as their variations during the period 1985–2006, were investigated with a spatially-distributed hydrologic modeling system (SWAT). A wetland module was incorporated into the SWAT model to represent hydrological linkages between the wetland and adjacent upland areas. The modified modeling system was calibrated with streamflow measurements from 1987 to 1989 and was validated for the period 2005–2006. The calibration achieved a Nash efficiency coefficient (Ens) of 0.86, and the validation yielded an Ens of 0.66. In the past 20 yr, water surface area in the Zhalong wetland fluctuated from approximately 200 km2 to 1145 km2 with a rapid decreasing trend through the early 2000s. Consequently, water volume decreased largely in the preserve, especially in the dry seasons. The situation changed following the implementation of a river diversion in 2001. Overall, the modeling yielded plausible estimates of hydrologic changes in this large wetland reserve, building a foundation for assessing ecological water requirements and developing strategies and plans for future water resources management within the river basin.

scholarly journals Human Activities and Climate Variability Affecting Inland Water Surface Area in a High Latitude River Basin

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 382 ◽  
Author(s):  
Liwen Chen ◽  
Guangxin Zhang ◽  
Y. Jun Xu ◽  
Shengbo Chen ◽  
Yanfeng Wu ◽  
...  
Keyword(s):  
Surface Area ◽  
River Basin ◽  
High Latitude ◽  
Human Activities ◽  
Water Surface ◽  
Water Bodies ◽  
Total Water ◽  
Inland Water ◽  
Water Surface Area ◽  
Inland Water Bodies

Spatiotemporal changes in the surface area of inland water bodies have important implications in regional water resources, flood control, and drought hazard prediction. Although inland water bodies have been investigated intensively, few studies have looked at the effect of human activities and climate variability on surface area of inland waters at a larger scale over time and space. In this study, we used MODIS (MOD13Q1) images to determine water surface area extent at 250 m spatial resolution. We then applied this algorithm with MOD13Q1 images taken at 16-day intervals from 2000 to 2018 to a large river basin in China’s northeast high latitude region with dense stream network and abundant wetlands to investigate spatiotemporal distribution and dynamics of inland water bodies. The study identified 209 ponds, lakes, and reservoirs with an average total surface area of 2080 km2 in the past 19 years. The total water surface area fluctuated largely from 942 km2 to 5169 km2, corresponding to rainfall intensity and flood. We found that the total water surface area in this high latitude river basin showed an increasing trend during the study period, while the annual precipitation amount in the river basin also had an increasing trend concurrently. Precipitation and irrigation significantly contributed to the monthly change of water surface area, which reached the highest during June and August. The increase of water surface area was significant in the lower basin floodplain region, where agricultural irrigation using groundwater for rice production has progressed. Four nationally important wetland preserves (Zhalong, Xianghai, Momoge, and Chagan Lake) in the river basin made up nearly 50% of the basin’s total water surface area, of which Zhalong, Xianghai, and Momoge are designated by The Ramsar Convention as wetland sites of international importance. Seasonally, these water bodies reached their maximal surface area in August, when both the monsoon weather and agricultural discharge prevailed. This study demonstrates that water surface area in a high latitude river basin is affected by both human activities and climate variation, implying that high latitude regions will likely experience more changes in surface water distribution as global climate change continues and agriculture becomes intensified.

Scaling relationships between lake surface area and catchment area

2020 ◽  
Vol 82 (3) ◽  
Author(s):  
Jonathan A. Walter ◽  
Rachel Fleck ◽  
Michael L. Pace ◽  
Grace M. Wilkinson
Keyword(s):  
Surface Area ◽  
Catchment Area ◽  
Lake Surface ◽  
Scaling Relationships ◽  
Lake Surface Area

scholarly journals Simplified Lake Surface Area Method for the Minimum Ecological Water Level of Lakes and Wetlands

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1056 ◽  
Author(s):  
Songpu Shang ◽  
Songhao Shang
Keyword(s):  
Water Level ◽  
Surface Area ◽  
Lake Level ◽  
Lake Ecosystem ◽  
Lake Surface ◽  
Area Method ◽  
Ecosystem Protection ◽  
Lake Morphology ◽  
Lake Surface Area ◽  
Ecological Water Level

The determination of the rational minimum ecological water level is the base for the protection of ecosystems in shrinking lakes and wetlands. Based on the lake surface area method, a simplified lake surface area method was proposed to define the minimum ecological lake level from the lake level-logarithm of the surface area curve. The curve slope at the minimum ecological lake level is the ratio of the maximum lake storage to the maximum surface area. For most practical cases when the curve cannot be expressed as a simple analytical function, the minimum ecological lake level can be determined numerically using the weighted sum method for an equivalent multi-objective optimization model that balances ecosystem protection and water use. This method requires fewer data of lake morphology and is simple to compute. Therefore, it is more convenient to use this method in the assessment of the ecological lake level. The proposed method was used to determine the minimum ecological water level for one freshwater lake, one saltwater lake, and one wetland in China. The results can be used in the lake ecosystem protection planning and the rational use of water resources in the lake or wetland basins.

Forecasting future changes in Manzala Lake surface area by considering variations in land use and land cover using remote sensing approach

2018 ◽  
Vol 11 (5) ◽  
Author(s):  
Hickmat Hossen ◽  
Mona G. Ibrahim ◽  
Wael Elham Mahmod ◽  
Abdelazim Negm ◽  
Kazuo Nadaoka ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Land Cover ◽  
Surface Area ◽  
Lake Surface ◽  
Lake Surface Area

Combined use of Sentinel-2 and Landsat 8 to monitor water surface area dynamics using Google Earth Engine

2020 ◽  
Vol 11 (7) ◽  
pp. 687-696
Author(s):  
Xiucheng Yang ◽  
Yang Chen ◽  
Jingzhe Wang
Keyword(s):  
Surface Area ◽  
Water Surface ◽  
Google Earth ◽  
Landsat 8 ◽  
Water Surface Area ◽  
Combined Use ◽  
Google Earth Engine ◽  
Sentinel 2
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