scholarly journals Suitability maps for managed aquifer recharge: a review of multi-criteria decision analysis studies

2019 ◽  
Vol 27 (2) ◽  
pp. 138-150 ◽  
Author(s):  
Jana Sallwey ◽  
José Pablo Bonilla Valverde ◽  
Felipe Vásquez López ◽  
Ralf Junghanns ◽  
Catalin Stefan
Keyword(s):  
Decision Analysis ◽  
Managed Aquifer Recharge ◽  
Specific Information ◽  
Aquifer Recharge ◽  
Web Based ◽  
Multi Criteria Decision Analysis ◽  
Management Plans ◽  
Query Tool ◽  
Suitability Maps ◽  
User Friendly

Suitability maps for managed aquifer recharge (MAR) sites hold a strong potential for integration into sustainable groundwater management plans. An uprising method to identify sites suitable for MAR implementation is geographic information system (GIS)-based multi-criteria decision analysis (MCDA). There are no guidelines or a common understanding on how suitability mapping should be conducted, and there is considerable variability as to what factors are assessed and how they are weighted. To increase knowledge on GIS-MCDA, a database has been built based on 63 studies applying GIS-MCDA in the context of MAR site selection. Information on the criteria, assigned weights, and methodologies has been retrieved from the documents. Statistical analysis of the database depicts the current state of art for suitability mapping methodologies as well as specific information for the different recharge methods. We further incorporated the compiled information into a web-based query tool that makes the information easily accessible and the utilization of the database more user friendly. This review as well as the created web-tool will help planners of MAR sites to engage in the MCDA in a more structured way by referring to previously conducted studies and by finding information suitable for their specific project. The application potential of suitability maps is discussed along with the shortcomings of this methodology.

scholarly journals Suitability Mapping for Managed Aquifer Recharge: Development of Web-Tools

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2254 ◽  
Author(s):  
Jana Sallwey ◽  
Robert Schlick ◽  
José Pablo Bonilla Valverde ◽  
Ralf Junghanns ◽  
Felipe Vásquez López ◽  
...  
Keyword(s):  
Relevant Information ◽  
Managed Aquifer Recharge ◽  
Web Gis ◽  
Aquifer Recharge ◽  
Web Based ◽  
Web Tools ◽  
Gis Data ◽  
Management Plans ◽  
Query Tool ◽  
Suitability Maps

Suitability maps for managed aquifer recharge (MAR) are increasingly used and hold the potential to be integrated into sustainable groundwater management plans. However, the quality of the maps strongly depends on the input data quality as well as the expertise of the decision-maker. The maps are commonly derived through GIS-based multi-criteria decision analysis (GIS-MCDA). To date, there is no common understanding of how suitability mapping should be conducted, as there is considerable variability concerning used GIS data and MCDA methodology. This study presents two web-tools that were conceptualized based on a review of GIS-MCDA studies in the context of MAR suitability mapping. The data retrieved from the review was compiled into a web-based query tool making the MAR- and MCDA-relevant information easily accessible. Based on the most commonly used MCDA practices in the assessed studies, we conceptualized and implemented a second web tool that comprises a simplified web GIS as well as supporting tools for weight assignment and standardization of the criteria. Both web tools will enable decision-makers to engage in MCDA for MAR mapping in a more structured and informed way. As the tools are open-source and web-based, they can facilitate the collaboration between multiple stakeholders and the easy sharing of results.

scholarly journals Site selection for managed aquifer recharge in the city of Kabul, Afghanistan, using a multi-criteria decision analysis and geographic information system

2021 ◽  
Author(s):  
Mohammad Salem Hussaini ◽  
Asadullah Farahmand ◽  
Sangam Shrestha ◽  
Sanjiv Neupane ◽  
Manuel Abrunhosa
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Decision Analysis ◽  
Infiltration Rate ◽  
Managed Aquifer Recharge ◽  
Drainage Density ◽  
Geographic Information ◽  
Aquifer Recharge ◽  
Multi Criteria Decision Analysis ◽  
Suitability Map

AbstractWhile the success and sustainability of managed aquifer recharge (MAR) strongly depends on many characteristics of the site, it is necessary to integrate the site characteristics and develop suitability maps to indicate the most suitable locations. The objective of this study is to integrate geographic information system (GIS) and multi-criteria decision analysis (MCDA) techniques to identify the most suitable areas for a MAR project in the Kabul city area, Afghanistan. Data for six effective criteria, including slope, drainage density, surface infiltration rate, unsaturated zone thickness, soil type and electrical conductivity, were collected and then a classification map was produced for each criterion in the GIS environment. By applying MCDA techniques, the weights of the effective criteria were obtained. A suitability map was generated from each technique separately based on a combination of all criteria weights and thematic layers. The result of the analytical network process (ANP) method was found to be more precise and reliable compared with that of the analytical hierarchy process (AHP) method. Based on the final suitability map produced from the ANP model, there is 3.7, 15.0, 37.4, 33.1 and 10.3% of the total area that is unsuitable, of low suitability, moderately suitable, suitable and very suitable for MAR application, respectively. As a final result of this work, seven sites have been prioritized based on land use. The integration of multi-criteria decision analysis and GIS is recognized as an effective method for the selection of managed aquifer recharge sites.

FindThatQuote: A Question-Answering Web-based System to Locate Quotes using Deep Learning and Natural-Language Processing

2021 ◽  
Author(s):  
Nathan Ji ◽  
Yu Sun
Keyword(s):  
Deep Learning ◽  
Natural Language Processing ◽  
Natural Language ◽  
Success Rate ◽  
Language Processing ◽  
Question Answering ◽  
Specific Information ◽  
Web Based ◽  
User Friendly ◽  
Web Based System

The digital age gives us access to a multitude of both information and mediums in which we can interpret information. A majority of the time, many people find interpreting such information difficult as the medium may not be as user friendly as possible. This project has examined the inquiry of how one can identify specific information in a given text based on a question. This inquiry is intended to streamline one's ability to determine the relevance of a given text relative to his objective. The project has an overall 80% success rate given 10 articles with three questions asked per article. This success rate indicates that this project is likely applicable to those who are asking for content level questions within an article.

scholarly journals Identification of suitable sites for managed aquifer recharge under semi-arid conditions employing a combination of numerical and analytical techniques

2021 ◽  
Vol 80 (17) ◽  
Author(s):  
Jafar Alkhatib ◽  
Irina Engelhardt ◽  
Martin Sauter
Keyword(s):  
Empirical Equation ◽  
Surface Characteristics ◽  
Managed Aquifer Recharge ◽  
Specific Yield ◽  
Multiple Model ◽  
Aquifer Recharge ◽  
Suitability Maps ◽  
Aquifer Characteristics ◽  
Groundwater Mound ◽  
Semi Arid

AbstractOverpumping or overexploitation of groundwater is one of the major threats for aquifer systems in arid and semi-arid areas. Managed aquifer recharge (MAR) has been suggested by many researchers as a sustainable and effective method to alleviate negative impacts of overpumping. Optimizing artificial recharge considers the selection of suitable MAR sites in terms of surface and subsurface characteristics. While surface characteristics at potential MAR sites could be modified (e.g. slope, soil texture, etc.), subsurface characteristics cannot be changed through engineering work. Characteristics of the aquifer, such as depth to groundwater, play an important role in determining the capability of an aquifer to store a specific volume of infiltrated water. Currently, only a limited number of quoted researches are available that consider factors related to aquifer characteristics and the range of these factors to identify optimal MAR sites. In this study, a new approach is presented, that employs numerical groundwater modeling to generate MAR suitability maps considering sub-surface characteristics, such as depth-to-groundwater, aquifer transmissivity and specific yield. Multiple model-runs are conducted to simulate groundwater table response with respect to the volume of infiltrated water. Simulation results are used to calibrate a groundwater mound empirical equation that calculates the groundwater level increase as a function of the transmissivity and infiltrated water volume for a given value of aquifer’ specific yield, range of vertical hydraulic conductivities and a specific design and operation conditions of the MAR system. The empirical equation is employed in GIS to spatially calculate the height of groundwater mound beneath a hypothetical MAR site and to generate, based on that, suitability maps for MAR implementation. Assuming that MAR structures capture the median of monthly surface runoff rates at the respective wadi (catchment area), suitability maps are generated for different configurations/scenarios of aquifer hydraulic conductivity in a parameter study. The results highlight the importance of integrating aquifer characteristics (geometry and hydraulic parameters) and expected magnitudes and fluxes of infiltration water in delineating suitable sites for MAR.

scholarly journals Approaches for deployment and access of content in delivery portals

2020 ◽  
Vol 77 ◽  
pp. 03005
Author(s):  
Theresa Rauffmann ◽  
Monika Wolf
Keyword(s):  
Real Life ◽  
Content Delivery ◽  
Target Group ◽  
Specific Information ◽  
Technical Documentation ◽  
Web Based ◽  
Life Circumstances ◽  
Search For Information ◽  
User Friendly ◽  
Current Standards

In the field of Technical Communication the focus has always been on supporting users in their search for information in a way that is appropriate for the target group. Products are becoming more and more complex, current standards require manufacturers to provide up-to-date Technical Documentation and digitalization is advancing rapidly. Content Delivery Portals offer new possibilities to provide information in a timely and user-friendly manner. They make it possible to provide the user with web-based, target-group specific information through navigation with facets and presents a new possible use of search engines in Technical Documentation. This paper deals with different possibilities on how content can be deployed and accessed for the user. The approaches are implemented in tools that are already on the market to illustrate the possibilities of deployment and access on real-life circumstances. In addition, an outlook is given on what the conceptual implementation of microDocs might look like.

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