Evaluation of rainfall and wetland water area variability at Thirlmere Lakes using Landsat time-series data

Banerjee, Bikram Pratap; Raval, Simit; Timms, Wendy

doi:10.1007/s13762-016-1018-z

Cited by 13 publications

(9 citation statements)

References 24 publications

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“…Landsat satellites (MSS, TM, ETM +, and OLI) that continuously provide medium resolution images are among the most widely used optical sensors in environmental research in the last five decades. The use of Landsat satellite images has an important place in numerous studies where the water surface areas of wetlands are extracted or the temporal changes are determined [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. The ability of cloud computing programs has been significantly improved in recent years, and they have shown great application potential in large-scale land cover mapping [44].…”

Section: Criteriamentioning

confidence: 99%

Analysis of the Temporal Changes of Inland Ramsar Sites in Turkey Using Google Earth Engine

Dervisoglu

2021

IJGI

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Ramsar Convention (RC) is the first of modern intergovernmental agreement on the conscious use and conservation of natural resources. It provides a platform for contracting parties working together to develop the best available data, advice, and policy recommendations to increase awareness of the benefits of wetlands in nature and society. Turkey became a party of the RC in 1994, and in the years 1994 to 2013, 14 wetlands that reached the Ramsar criteria were recognized as Ramsar sites (RS). With this study, all inland RS in Turkey from 1985 to 2020 were examined, and changes in the water surface areas were evaluated on the GEE cloud computing platform using Landsat satellite images and the NDWI index. The closest meteorological station data to each RS were evaluated and associated with the surface area changes. The reasons for the changes in these areas, besides the meteorological effects, have been scrutinized using management plans and publications. As a result, inland wetlands decreased at different rates from 1985 to 2020, with a total loss of 31.38% and 21571.0 ha for the spring months. Since the designation dates of RS, the total amount of water surface area reduction was 27.35 %, constituting 17,758.90 ha.

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Section: Criteriamentioning

confidence: 99%

Analysis of the Temporal Changes of Inland Ramsar Sites in Turkey Using Google Earth Engine

Dervisoglu

2021

IJGI

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“…In these areas with a low water table, the plant communities that rely on groundwater will definitely be influenced, especially for those trees with long roots (Bian et al, 2008; Yin et al, 2015). In arid and semi‐arid areas, the loss of groundwater will gradually result in the disappearance of rivers, springs, and well water, which have a close connection with groundwater and thus impact any nearby vegetation (Banerjee, Raval, & Timms, 2016). As shown in Figure 8, the river area in the Nanjiao mining area has reduced dramatically because of the loss of groundwater; the plant communities near the river show a significant difference in coverage, composition, and plant traits.…”

Section: Discussionmentioning

confidence: 99%

The long‐term effects of underground mining on the growth of tree, shrub, and herb communities in arid and semiarid areas in China

Yang

Hou

et al. 2020

Land Degrad Dev

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Underground mining (as opposed to open‐cast) often causes large‐scale subsidence, leading to various types of disturbances to surface vegetation. Adequate quantitative assessment of the long‐term effects of underground mining on the growth of different plant communities is important and still lacking. To address these issues, a vegetation growth contract model (VGCM) was proposed, and six indicators including the growth trend (GT), annual growth (AG), normalized spectrum entropy (Hsn), as well as the average value of annual‐average normalized difference vegetation index (NDVI; ANDVIave), annual‐maximum NDVI (ANDVImax), and annual‐minimum NDVI (ANDVImin) were selected. The long‐term effects of underground mining (EM) on the herb, shrub, and tree communities in the Nanjiao mining area, China, from 1987 to 2017 were evaluated. The results show that the plant communities, which maintained the same type in the areas influenced and not influenced by mining, accounting for 48.07% and 46% of the total area, respectively. As for these plant communities, underground mining had a significant negative effect on the AG, ANDVIave, and ANDVImax of both the herb and tree communities, while it had a positive effect on the GT and Hsn of the shrub community. Overall, underground mining had a negative effect on these three types of plant communities, and the EMs of the herb, tree, and shrub communities were −15.10, −6.79, and −4.03%, respectively. This research could provide a reference for evaluating the long‐term effects of mining activities on vegetation, and also give more insights into the effects of underground mining on different plant communities.

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“…On the other hand, Russell et al (2010) found that the declining water levels were due to climatic variability. Banerjee et al (2016) used Landsat time series data to establish the changes in Lakes water area and found that the rainfall variability was the dominant factor associated with these changes.…”

Section: Background and Previous Investigationsmentioning

confidence: 99%

A multidisciplinary study of groundwater conditions in sedimentary strata at Thirlmere Lakes (NSW)

David¹,

Timms²,

Rau³

et al. 2018

ASEG Extended Abstracts

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SUMMARYThe Thirlmere Lakes include five natural wetlands within a Blue Mountains World Heritage listed national park, where there are concerns over an apparent possibility of a long term decline in water levels. Lake levels correlate with rainfall variability and are historically known to have dried several times during prolonged droughts. However, the effects of long term hydrological changes on the Lakes are unclear, as are uncertainties associated with extraction of water for local uses and the possible effects of nearby longwall coal mining.This study is part of a large multi-disciplinary research program, of which this part focuses on groundwater conditions insedimentary strata, and the possibilities of interactions with sediments below the Lakes. Surface geophysical techniques and mapping of geological structures will be combined with deep drilling, wireline logging, geological and hydrogeological investigations. Characterisation of sedimentary strata include permeability, bulk density, moisture content, porewater stable water isotopes and XRD mineral identification. New deep drillholes are planned to obtain information on hydraulic properties of formations. A staged geophysical survey program is designed to complement the geological investigation. Resistivity imaging, time-domain electromagnetics and ground penetrating radar (GPR) will be employed to define sedimentary structure within the unconsolidated alluvium (sand, clay and peat layers) and depth estimates to the underlying rock. A combination of these geophysical methods and contextural geological information, will be used to identify structural and sedimentological anomalies and their hydrogeological properties such as permeability and connection to deeper strata. The results of this work provide new data on groundwater conditions in structured rock that underlie the sediments of Thirlmere Lakes.

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Evaluation of rainfall and wetland water area variability at Thirlmere Lakes using Landsat time-series data

Cited by 13 publications

References 24 publications

Analysis of the Temporal Changes of Inland Ramsar Sites in Turkey Using Google Earth Engine

Analysis of the Temporal Changes of Inland Ramsar Sites in Turkey Using Google Earth Engine

The long‐term effects of underground mining on the growth of tree, shrub, and herb communities in arid and semiarid areas in China

A multidisciplinary study of groundwater conditions in sedimentary strata at Thirlmere Lakes (NSW)

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