Drought Land Degradation and Desertification—Case Study of Nuntasi-Tuzla Lake in Romania

Maftei, Carmen; Dobrica, Gabriel; Cerneaga, Constantin; Buzgaru, Nicusor

doi:10.1007/978-3-030-76008-3_25

Cited by 2 publications

(4 citation statements)

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“…In the irrigation period, the two tributaries (Nuntasi and Sacele rivers) have supplied the lake constantly, but after 1990, when the irrigation was stopped, the river flow decreased over time reaching its lowest level in the 2004 (2007)-2020 period. In a recent publication, the authors [21] showed that "the precipitation increased starting with 2012 but the evapotranspiration losses are much larger than the precipitation increase". We can conclude that the budget is negative.…”

Section: Discussionmentioning

confidence: 99%

“…An Integrated Drought Management Programme (IDMP) was launched in 2013 by GWP (Global Water Partnership) for Central and Eastern Europe. The main objective [21] is to support the responsible authorities to prepare and integrate the Drought Management plan (DMP) within the future Basin Management Plan (BMP). In this context, more efforts are needed to validate the method proposed in this study.…”

Section: Discussionmentioning

confidence: 99%

“…In a recent work [21], we described the irrigation system built in 1971-1975 and operable till 1990. After this year, the demand for irrigation decreased to 20% of its capacity.…”

Section: Study Areamentioning

confidence: 99%

“…In order to ensure water demand, the Razim-Sinoe lagoons were transformed into a large freshwater reservoir. The three greatest hydraulic works were constructed in that period: (i) closure of the natural gateway between the lagoons and Black Sea, (ii) closurevia sluices of the connections between the lakes and (iii) resizing of three canals which supply the reservoir with fresh water from the Danube (St George Arm) so as to ensure a total discharge of 260 mc/s (for a probability of occurrence of 1%) with an average of 80 mc/s [21]. These works led to important changes in the hydrological regime of the region and to a great disturbance of the ecological balance of all the lakes.…”

Section: Study Areamentioning

confidence: 99%

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Surface Water Change Detection via Water Indices and Predictive Modeling Using Remote Sensing Imagery: A Case Study of Nuntasi-Tuzla Lake, Romania

Şerban

Maftei

Dobrica

2022

Water

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Water body feature extraction using a remote sensing technique represents an important tool in the investigation of water resources and hydrological drought assessment. Nuntasi-Tuzla Lake, a component of the Danube Delta Natural Reserve, is located on the Romanian Black Sea littoral. On account of an event in summer 2020, when the lake surface water decreased significantly, this study aims to identify the variation of the Nuntasi-Tuzla Lake surface water over a long-term period in correlation with human intervention and climate change. To this end, it provides an analysis in the period 1965–2021 via hydrological drought indices and data mining classification. The latter approach is based on several water indices derived from Landsat TM/ETM+/OLI and MODIS full-time series datasets: Normalized Difference Vegetation Index (NDVI), Normalized Difference Vegetation Index (NDVI), Modified NDWI (MNDWI), Weighted Normalized Difference Water Index (WNDWI), and Water Ratio Index (WRI). The experimental results indicate that the proposed classification methods can extract relevant features from waterbodies using remote sensing imagery with a high accuracy. Moreover, the study shows a similarity in the evolution of surface water cover identified with the data mining classification and the drought periods detected in the flow data series for the Nuntasi and Sacele Rivers that supply the Nuntasi-Tuzla Lake. Overall, the results of our investigation show that human intervention and hydrological drought had an extensive impact on the long-term changes in surface water of the Nuntasi-Tuzla Lake.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…In a recent work [21], we described the irrigation system built in 1971-1975 and operable till 1990. After this year, the demand for irrigation decreased to 20% of its capacity.…”

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

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Surface Water Change Detection via Water Indices and Predictive Modeling Using Remote Sensing Imagery: A Case Study of Nuntasi-Tuzla Lake, Romania

Şerban

Maftei

Dobrica

2022

Water

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Analysis Methods for Hydrological Drought

Maftei,

Dobrica,

Barbulescu

et al. 2023

Modeling and Monitoring Extreme Hydrometeorological Events

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According to the World Meteorological Organization, the total economic impact of drought in Europe in the past 30 years was close to €100 billion. A recent publication by the European Environment Agency states that meteorological and hydrological droughts have become more frequent and severe in most of Europe, “being the highest in southern Europe.” Significant changes in worldwide hydrography have occurred recently, as evidenced by the drying up of some lakes and a decrease in river flows. In a handbook published by WMO and Global Water Partnership, a set of indices and indicators were proposed to investigate different drought types. The data needed to calculate these indices refers to different hydrometeorological variables, and their analysis must be carried out. The indices based on remote sensing data could offer a viable alternative to improve the observation. Based on different applications realized by the authors, we propose a review of the methods used to identify hydrological drought. It suggests a methodology appropriate to the Dobrogea region in southeastern Romania.

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Drought Land Degradation and Desertification—Case Study of Nuntasi-Tuzla Lake in Romania

Cited by 2 publications

References 1 publication

Surface Water Change Detection via Water Indices and Predictive Modeling Using Remote Sensing Imagery: A Case Study of Nuntasi-Tuzla Lake, Romania

Surface Water Change Detection via Water Indices and Predictive Modeling Using Remote Sensing Imagery: A Case Study of Nuntasi-Tuzla Lake, Romania

Analysis Methods for Hydrological Drought

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