Temporal and spatial characterization of sediment transport through a karst aquifer by means of time series analysis

Jukić, Damir; Denić-Jukić, Vesna; Kadić, Ana

doi:10.1016/j.jhydrol.2022.127753

Cited by 7 publications

(4 citation statements)

References 68 publications

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“…The obtained results show that the hysteresis loop between exceeding turbidity and discharge can be very useful in analyses of water turbidity from karst springs. They confirmed the existing hypothesis about the turbidity mechanism of the Jadro Spring [43]. Turbidity is generated by sediment from several relatively separate conduit systems that transport water to the spring with different time delays.…”

Section: Discussionsupporting

confidence: 85%

“…The existing studies that dealt w this topic analyzed the relationship between turbidity, rainfall, and discharge, and th show that turbidity depends on discharge, and it often exceeds the permitted standard drinking water [39][40][41][42]. The existing hypothesis is that the origin of turbidity is predom nantly the remobilized autochthonous sediment from aquifer, with a possible limited co tribution of allochthonous sediment from the part of the catchment located in the vicin of the spring [43]. A proposal for a technical solution to this problem can be found in [1 Detailed hydrogeological and hydrological information about the Jadro Spring has be published in several publications, e.g., [44][45][46][47].…”

Section: Methodsmentioning

confidence: 99%

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Exceeding Turbidity versus Karst Spring Discharge during Single Rainfall Events: The Case of the Jadro Spring

Kadić

Denić-Jukić

Jukić

2023

Water

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The relationship between karst spring discharge and turbidity during periods where the turbidity exceeds the permitted value of 4 NTU is analyzed by means of classical hydrological methods including hysteresis loops. The Williams method (1989) is adjusted by replacing river discharge with karst spring discharge, and sediment concentration with exceeding turbidity. The study’s first part focuses on the general hydrological characteristics of cumulative rainfall, turbidity, and discharge during each period. In the second part, four major types of hysteresis loops are identified, classified, and hydrologically explained. The study area is the karst catchment of the Jadro Spring in Croatia. The obtained results show that hysteresis loops can be very useful in analyses of water turbidity from karst springs. A relationship between the type of loop, intensity of discharge, and size of the secondary peak in turbidity is identified. The major types of hysteresis loops were clockwise, counterclockwise, figure-eight and complex loops, and their main characteristics were summarized. The results gave a new insight into the behavior of the turbidity of the Jadro Spring.

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Section: Discussionsupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Exceeding Turbidity versus Karst Spring Discharge during Single Rainfall Events: The Case of the Jadro Spring

Kadić

Denić-Jukić

Jukić

2023

Water

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“…Unlike Fourier analysis, wavelet analysis enables the identification of th quency content of a time signal at a specific time point, even if the signal is non-statio In practical applications, two main forms of wavelet analysis are distinguished: the tinuous wavelet transform (CWT), which is used to generate two-dimensional tim quency (or scale) scalograms of a time-series, and the discrete wavelet transform (D which is used primarily to approximate high-frequency signals at lower frequency by performing a low-pass (resolution) filtering, see [31] for more details. The DWT time series of x(t) is defined as [49,50] and was chosen here:…”

Section: Multiresolution Analysis Of Input Data Using the Discrete Wa...mentioning

confidence: 99%

Drought Monitoring and Prediction in Agriculture: Employing Earth Observation Data, Climate Scenarios and Data Driven Methods; a Case Study: Mango Orchard in Tamale, Ghana

Hobart,

Schirrmann,

Abubakari

et al. 2024

Remote Sensing

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The study focused on the prediction of the Temperature Vegetation Dryness Index (TVDI), an agricultural drought index, for a Mango orchard in Tamale, Ghana. It investigated the temporal relationship between the meteorological drought index, Standardized Precipitation Index (SPI), and TVDI. The SPI was calculated based on utilizing precipitation data from the World Meteorological Organization (WMO) database (2010–2022) and CMIP6 projected precipitation data (2023–2050) from 35 climate models representing various Shared Socioeconomic Pathway (SSP) climate change scenarios. Concurrently, TVDI was derived from Landsat 8/9 satellite imagery, validated using thermal data obtained from unmanned aerial vehicle (UAV) surveys. A comprehensive cross-correlation analysis between TVDI and SPI was conducted to identify lag times between these indices. Building on this temporal relationship, the TVDI was modeled as a function of SPI, with varying lag times as inputs to the Wavelet-Adaptive Neuro-Fuzzy Inference System (Wavelet-ANFIS). This innovative approach facilitated robust predictions of TVDI as an agricultural drought index, specifically relying on SPI as a predictor of meteorological drought occurrences for the years 2023–2050. The research outcome provides practical insights into the dynamic nature of drought conditions in the Tamale mango orchard region. The results indicate significant water stress projected for different time frames: 186 months for SSP126, 183 months for SSP245, and 179 months for both SSP370 and SSP585. This corresponds to a range of 55–57% of the projected months. These insights are crucial for formulating proactive and sustainable strategies for agricultural practices. For instance, implementing supplemental irrigation systems or crop adaptations can be effective measures. The anticipated outcomes contribute to a nuanced understanding of drought impacts, facilitating informed decision-making for agricultural planning and resource allocation.

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“…Suspended sediments are such agents that are often induced by the turbulent flow along the karst conduits and cave streams (Mueller et al, 2023;Jukić et al, 2022;Richter et al, 2022). In this respect, understanding the (suspended) sediment transport is particularly important for karst transport processes in two ways.…”

Section: Develop Adequate Approaches For Sediment Transport In Karst ...mentioning

confidence: 99%

Karst water resources in a changing world: Review of solute transport modelling approaches

Çallı,

Chiogna,

Bittner

et al. 2024

Preprint

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Karst water resources are valuable freshwater sources for around 10 % of the world population. Nonetheless, anthropogenic factors and global changes have been seriously deteriorating the karst water quality and dependent ecosystems. Solute transport models are powerful tools to monitor, control, and manage the water quality and dependent ecosystem functioning. By representing and predicting the spatiotemporal behavior of solute migration in karst systems, the transport models enhance our understanding about the karst transport processes, thus enabling us to explore contamination risks and potential outcomes. This paper reviews the current state of knowledge on the modelling of solute transport processes in karst aquifers, thereby unveiling the fundamental challenges underlying a successful karst transport modelling. We discuss to what extent and in what ways we can handle these challenges and derive the key challenges and directions for reliable modelling of transport processes in karst systems in the present context of global changes.

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Temporal and spatial characterization of sediment transport through a karst aquifer by means of time series analysis

Cited by 7 publications

References 68 publications

Exceeding Turbidity versus Karst Spring Discharge during Single Rainfall Events: The Case of the Jadro Spring

Exceeding Turbidity versus Karst Spring Discharge during Single Rainfall Events: The Case of the Jadro Spring

Drought Monitoring and Prediction in Agriculture: Employing Earth Observation Data, Climate Scenarios and Data Driven Methods; a Case Study: Mango Orchard in Tamale, Ghana

Karst water resources in a changing world: Review of solute transport modelling approaches

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