Influence of Karstic System on Surface Flooding in Mediterranean Climate

Raynaud, Felix; Mathieu-Subias, Helene; Borrell-Estupina, Valérie; Pistre, Séverin; Seidel, Jean-Luc; Van-Exter, Sandra; Montety, Véronique de; Hernandez, F.

doi:10.1007/978-3-319-09054-2_38

Cited by 2 publications

(1 citation statement)

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“…The topographic watershed thus differs from the total water catchment, which includes both surface and groundwater catchments. In Mediterranean watersheds where karstic flows are common, subsurface transfers between watersheds are often observed (e.g., [29,30]). However, it is often very difficult, if not impossible, to determine the area of land contributing to these water exchanges.…”

Section: Data Used For the Diagnostic Methodsmentioning

confidence: 99%

A Rapid Method to Estimate the Different Components of the Water Balance in Mediterranean Watersheds

Banton

St-Pierre

Giraud

et al. 2022

Water

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The sustainable management of water resources, whether surface or underground, requires the identification of the flows involved and the possibility of achieving the water balance of the water resource. These require knowledge of the main flow components with a sufficient level of accuracy. Hydrological simulation models are valuable tools for studying flow at the watershed scale but rely on data that are rarely available; therefore, they require the implementation of field investigations. There is thus a need for simple and practical tools for studying the functioning of a watershed and identifying the different components of the flows. In this paper, a method that uses only weather data, volumes of water abstraction by pumping or diversion, and flows measured at the outlet is proposed. The use of cumulative multi-year curves of measured flows or rainfall provides an assessment of the unknown flows that can take place in the watershed, as well as the order of the respective magnitudes of fast and slow flows. Its application to 20 French Mediterranean watersheds shows that it is possible to properly estimate the order of magnitude of losses or gains linked to karst flows and irrigation input. External inflows or outflows can represent up to 150% of the flow measured at the outlet. The annual volumes estimated by using this method are indeed very close (R2 = 93%) to those provided by existing knowledge. The proposed method can constitute a first approach for the quantification of flows and help to guide the implementation of field investigations and more sophisticated approaches such as hydrological modelling.

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Section: Data Used For the Diagnostic Methodsmentioning

confidence: 99%

A Rapid Method to Estimate the Different Components of the Water Balance in Mediterranean Watersheds

Banton

St-Pierre

Giraud

et al. 2022

Water

View full text Add to dashboard Cite

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Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China

et al. 2021

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Datong Basin is a platform uplift formed in the Cenozoic era and has a significant coal-bearing geological unit in China. Tashan Mine is located in the middle-eastern part of the Datong Basin, the coal resources of the Taiyuan Formation are abundant, and the research value is enormous. Of the coal resources, coal seams 3–5 and 8 are the main. The lack of research in sequence stratigraphy, coal-forming environment, coal-accumulating model limits the layout efficiency of working face and the exploration and development efficiency of coal measures associated resources. This study used sedimentary and sequence stratigraphy and calculated and measured field drilling data to investigate the sequence stratigraphic characteristics, paleogeographic pattern, and coal accumulation model of the Taiyuan Formation. The sequence boundary and system tract boundary were identified, and the Taiyuan Formation was divided into four third-order sequences. The paleogeographic pattern was reconstructed with the third-order sequence as a unit by applying the single-factor analysis and multifactor comprehensive mapping. Additionally, the distribution characteristics of the main coal seams were clarified, and the corresponding coal accumulation model was reconstructed. The results exhibit that the sedimentary facies transformed from carbonate platform–tidal flat–lagoon–shallow water delta facies to shallow water delta facies from SQ1 to SQ2, coal seam 8 formed in interdistributary bay microfacies and peat swamp microfacies in SQ1. Transgression further expanded in SQ3, and the sedimentary facies were still dominated by the shallow water delta facies. Coal seams 3–5 are formed in distributary channel microfacies, which consist of interdistributary bay microfacies and peat swamp microfacies. The paleogeographic pattern was still dominated by shallow water delta in SQ4, in which interdistributary depressions and peat swamp microfacies widely developed. The thickness of coal seams 3–5 is in the range of 2.40–25.90 m, in which the northwestern study area is characterized by moderate water depth and sufficient fine sediment, and the widely developed distributary bay and peat swamp deposited a thick coal seam. The thickness of coal seam 8 is in the range of 0.5–10.5 m, and the thickness is stable (mostly thicker than 6 m) controlled by the widely developed lagoon, mud flat, and peat swamp microfacies and reduction water environment.

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Influence of Karstic System on Surface Flooding in Mediterranean Climate

Cited by 2 publications

References 1 publication

A Rapid Method to Estimate the Different Components of the Water Balance in Mediterranean Watersheds

A Rapid Method to Estimate the Different Components of the Water Balance in Mediterranean Watersheds

Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China

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