Towards making karst hydrologic models more user-friendly – The integration of the LuKARS model into FREEWAT

2020 ◽  
Author(s):  
Daniel Bittner ◽  
Ayla Rychlik ◽  
Tobias Klöffel ◽  
Anna Leuteritz ◽  
Markus Disse ◽  
...  
Keyword(s):  
Land Use ◽  
Resource Management ◽  
Open Source ◽  
Water Resource ◽  
Water Resource Management ◽  
Land Use Changes ◽  
Spring Discharge ◽  
Systems Model ◽  
Karst Systems ◽  
User Friendly

<p>Modeling karst spring discharge while considering potential impacts of land use changes in a recharge area is a crucial task for water resource managers worldwide. Generally, such models are based on sophisticated mathematical functions developed and applied by researchers and their complex nature does not allow an intuitive applicability. To overcome this limitation and to make these models applicable for stakeholders, they need to be integrated in an applicable and open source framework that can be used by water managers without losing the original and full modeling functionalities.</p><p>In our work, we introduce a user-friendly modeling environment by integrating the recently proposed LuKARS (Land use change modeling in KARSt systems) model into FREEWAT (FREE and Open Source Software Tools for WATer Resource Management). LuKARS is a lumped, rainfall-discharge model for karst systems that considers impacts of land use changes by changing the area of a so-called hydrotope, representing a landscape unit with homogeneous soil and land use properties. FREEWAT provides an open source toolkit for water resource management that is implemented as a plugin in QGIS. The integration of LuKARS benefits from QGIS’ mapping, visualization and geospatial manipulation capabilities. The plugin of FREEWAT provides a modular concept of pre- and post-processing tools that facilitate the setup, calibration, analysis, storage and sharing of a LuKARS model.</p>

Proposal of a typology of karst systems functioning based on relevant indicators of karst springs hydrodynamics

2021 ◽  
Author(s):  
Guillaume Cinkus ◽  
Naomi Mazzilli ◽  
Hervé Jourde
Keyword(s):  
Time Series ◽  
Resource Management ◽  
Water Resource ◽  
Water Resource Management ◽  
Spring Discharge ◽  
Karst Water ◽  
Discharge Time ◽  
Wide Range ◽  
Karst Systems ◽  
Hydrological Functioning

<p>10% of the world’s population is dependent on karst water resources for drinking water. Understanding the functioning of these complex and heterogeneous systems is therefore a major challenge for long term water resource management. Over the past century, different methods have been developed to analyse hydrological series, and subsequently characterize the functioning of karst systems. These methods can be considered as a preliminary step in the development and design of hydrological models of karst functioning for sustainable water resource management. Recent progress in analytical tools, as well as the emergence of data bases of discharge time series (e.g. the French SNO KARST database and the WoKaS database at global scale) allow reconsidering former typology of karst system hydrodynamic responses. Ten karst systems and associated spring discharge time series were considered for developing the typology. The systems are well-known with a high-quality monitoring and they cover a wide range of hydrological functioning, which ensure the relevance of the analyses. The methodology for the assessment and the development of the typology consisted in (i) the analysis of springs discharge time series according to four different methods, (ii) the selection or proposal of the most relevant indicators of karst systems hydrodynamics, and (iii) the interpretation of the information from these indicators based on principal component analysis and clustering techniques. A typology of karst systems accounting for 6 different classes is finally proposed, based on 3 aspects of functioning: the capacity of dynamic storage, the draining dynamic of the capacitive function and the variability of the hydrological functioning. The typology was applied to a wider dataset composed of spring discharge of 78 karst systems. The results show a relevant distribution of the systems among the different classes.</p>

scholarly journals Characteristics and Controlling Factors of the Drought Runoff Coefficient

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1259
Author(s):  
Rei Itsukushima
Keyword(s):  
Land Use ◽  
Resource Management ◽  
Water Resource ◽  
Water Resource Management ◽  
Controlling Factors ◽  
Low Flow ◽  
Drought Risk ◽  
Runoff Coefficient ◽  
Topographical Factors ◽  
The Relationship

Increasing water demand due to population growth, economic development, and changes in rainfall patterns due to climate change are likely to alter the duration and magnitude of droughts. Understanding the relationship between low-flow conditions and controlling factors relative to the magnitude of a drought is important for establishing sustainable water resource management based on changes in future drought risk. This study demonstrates the relationship between low-flow and controlling factors under different severities of drought. I calculated the drought runoff coefficient for six types of occurrence probability, using past observation data of annual total discharge and precipitation in the Japanese archipelago, where multiple climate zones exist. Furthermore, I investigated the pattern of change in the drought runoff coefficient in accordance with the probability of occurrence of drought, and relationships among the coefficient and geological, land use, and topographical factors. The drought runoff coefficient for multiple drought magnitudes exhibited three behaviors, corresponding to the pattern of precipitation. Results from a generalized linear model (GLM) revealed that the controlling factors differed depending on the magnitude of the drought. During high-frequency droughts, the drought runoff coefficient was influenced by geological and vegetation factors, whereas land use and topographical factors influenced the drought runoff coefficient during low-frequency droughts. These differences were caused by differences in runoff, which dominated stream discharge, depending on the magnitude of the drought. Therefore, for effective water resource management, estimation of the volume of drought runoff needs to consider the pattern of precipitation, geology, land use, and topography.

scholarly journals Impacts of Climate and Land-Use Change on Blue and Green Water: A Case Study of the Upper Ganjiang River Basin, China

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2661
Author(s):  
Yongfen Zhang ◽  
Chongjun Tang ◽  
Aizhong Ye ◽  
Taihui Zheng ◽  
Xiaofei Nie ◽  
...  
Keyword(s):  
Land Use ◽  
Resource Management ◽  
Water Resources ◽  
Land Use Change ◽  
River Basin ◽  
Water Resource ◽  
Water Resource Management ◽  
Green Water ◽  
Precipitation Changes ◽  
Ganjiang River Basin

Quantitatively figuring out the effects of climate and land-use change on water resources and their components is essential for water resource management. This study investigates the effects of climate and land-use change on blue and green water and their components in the upper Ganjiang River basin from the 1980s to the 2010s by comparing the simulated changes in blue and green water resources by using a Soil and Water Assessment Tool (SWAT) model forced by five climate and land-use scenarios. The results suggest that the blue water flow (BWF) decreased by 86.03 mm year−1, while green water flow (GWF) and green water storage (GWS) increased by 8.61 mm year−1 and 12.51 mm year−1, respectively. The spatial distribution of blue and green water was impacted by climate, wind direction, topography, and elevation. Climate change was the main factor affecting blue and green water resources in the basin; land-use change had strong effects only locally. Precipitation changes significantly amplified the BWF changes. The proportion of surface runoff in BWF was positively correlated with precipitation changes; lateral flow showed the opposite tendency. Higher temperatures resulted in increased GWF and decreased BWF, both of which were most sensitive to temperature increases up to 1 °C. All agricultural land and forestland conversion scenarios resulted in decreased BWF and increased GWF in the watershed. GWS was less affected by climate and land-use change than GWF and BWF, and the trends in GWS were not significant. The study provides a reference for blue and green water resource management in humid areas.

scholarly journals Integrating Sustainable Water Resource Management and Land Use Decision-Making

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2282
Author(s):  
Heidi L. N. Moltz ◽  
Carlington W. Wallace ◽  
Erfaneh Sharifi ◽  
Karin Bencala
Keyword(s):  
Decision Making ◽  
Land Use ◽  
Resource Management ◽  
Water Resource ◽  
Water Resource Management ◽  
Information Dissemination ◽  
Lessons Learned ◽  
Clear Understanding ◽  
Sustainable Water Resource ◽  
Sustainable Water Resource Management

Human uses of land and water are directly linked and must, therefore, be managed with each other in mind. This paper puts forward an approach for integrating sustainable water resource management into local land use decision-making in the Potomac basin. The approach includes developing a clear understanding of the current regulatory, programmatic, and financial approaches to land use management; identifying opportunities from innovation; and developing a flexible, stakeholder-based framework for moving forward. Four opportunities for innovation were identified in the Potomac basin utilizing this approach, including enhancing coordination and access to information, promoting incentives to achieve desired outcomes, encouraging and promoting innovation, and integrating programs to achieve multiple objectives. The successful integration of land and water decision-making requires a sustained, long-term commitment to improvement rather than a one-time fix mentality. Initial steps for implementation include identifying and engaging diverse partners, as well as establishing channels for information dissemination. The lessons learned from this work may prove valuable to decision-makers in other regions to holistically manage diverse land and water resources.

Policies, Land Use, and Water Resource Management in an Arid Oasis Ecosystem

2015 ◽  
Vol 55 (5) ◽  
pp. 1036-1051 ◽  
Author(s):  
Xian Xue ◽  
Jie Liao ◽  
Youtian Hsing ◽  
Cuihua Huang ◽  
Famin Liu
Keyword(s):  
Land Use ◽  
Resource Management ◽  
Water Resource ◽  
Water Resource Management ◽  
Oasis Ecosystem

Linking a Land-Use Cellular Automata with a Water Allocation Model to Simulate Land Development Constrained by Water Availability in the Elbow River Watershed in Southern Alberta

GEOMATICA ◽  
2011 ◽  
Vol 65 (4) ◽  
pp. 365-374 ◽  
Author(s):  
Bas Straatman ◽  
Jean-Gabriel Hasbani ◽  
Tom Tang ◽  
Kent Berg ◽  
Niandry Moreno ◽  
...  
Keyword(s):  
Land Use ◽  
Resource Management ◽  
Cellular Automata ◽  
Water Resource ◽  
Water Availability ◽  
Water Resource Management ◽  
Land Development ◽  
River Watershed ◽  
Southern Alberta ◽  
Ca Model

The availability of water resources in southern Alberta is under pressure, now and most likely even more so in the remainder of the 21st century if forecasts on climate change, economic development and associated population growth come true. Alberta Environment is mandated by the provincial Water Act to regulate most use of water through a system of water licenses. This department is currently using a water resource management model (WRMM) to support its planning, but wishes to expand the reach of its decision support tools by including additional factors such as the land-use dynamics. This paper presents the coupling of the WRMM and a land-use cellular automata (CA) model to constrain land development based on water availability in the Elbow River watershed in southern Alberta. Simulations were run with a calibrated CA model using a land-use map of 2006 as the starting year up to the year 2031, at a five-year interval and at a spatial resolution of 60 m. Two scenarios were tested: the business as usual scenario, which is a simple extrapolation of observed historical land development, expressed as the number of built-up cells, and a second scenario in which land development is constrained based on the WRMM water availability output. Results indicate that land development varies in terms of growth and spatial distribution when comparing the two scenarios. The potential benefits and limitations of the two models are discussed and further improvement needed to increase their usefulness in guiding water resource management is highlighted.

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