Evaluation of water resources management and agronomic scenarios using an integrated modelling system for coastal agricultural watersheds: The case of Almyros Basin, Thessaly, Greece

2021 ◽  
Author(s):  
Aikaterini Lyra ◽  
Athanasios Loukas ◽  
Konstantinos Voudouris ◽  
Nikitas Mylopoulos
Keyword(s):  
Surface Water ◽  
Water Resources ◽  
Water Resources Management ◽  
Seawater Intrusion ◽  
Water Productivity ◽  
Integrated Modelling ◽  
Agricultural Watersheds ◽  
Resources Management ◽  
Modelling System

<p>Coastal agricultural watersheds face complex problems of water quantity and quality.  In many coastal agricultural watersheds, the problems arise from: i) the limited use of surface water, ii) the excessive groundwater abstractions for irrigation, and iii) the over-fertilization practices for crop yield magnification. These complex and interrelated problems may be studied by using an integrated modelling system of surface water and groundwater able to simulate the processes regarding the quantity and quality of water. In this study, water resources management and agronomic scenarios are developed for the evaluation of the quantity and quality of the groundwater system of the semi-arid coastal agricultural Almyros Basin, in Thessaly, Greece. The historical and current unsustainable irrigation and fertilization practices, the groundwater abstractions, and the limited use of surface water reservoirs have caused a large water deficit of the aquifer system, groundwater nitrate contamination and seawater intrusion, resulting in severe degradation of water resources. Land use change and agronomic scenarios, as well as, reservoir operation scenarios, are combined and simulated using an integrated modelling system.   The Integrated Modelling System consists of coupled models of: surface hydrology (UTHBAL), groundwater flow (MODFLOW), agronomic practices and nitrate leaching (REPIC, an R-ArcGIS based EPIC model), nitrate transport (MT3DMS), and seawater intrusion (SEAWAT). The models have been calibrated and validated against observations/measurements of various variables, e.g. groundwater table levels, crop yields, nitrate concentrations and chloride concentrations.  The feasibility of the simulation of the various scenarios have been, also, evaluated with indices of Crop Water Productivity (CWP), Nitrogen Use Efficiency (NUE) and Economic Water Productivity (EWP).</p>

scholarly journals Legal Policy of Water Resources Management by Local Governments: A Review of Right to Water in Indonesia

2016 ◽  
Vol 1 (2) ◽  
pp. 250
Author(s):  
Nadia Astriani
Keyword(s):  
Surface Water ◽  
Water Resources ◽  
Water Resources Management ◽  
Local Governments ◽  
Management Policy ◽  
Constitutional Court ◽  
Legal Certainty ◽  
Normative Study ◽  
Resources Management ◽  
The Law

This study is based by the cancellation of Act No. 7 of 2004 on Water Resources by the Indonesian Constitutional Court. Over the past 10 years, the law is the basis for the water resources management in Indonesia. The cancellation of the law would provide great impact for water resources management policy, especially with regard to the provision of right to water. Hence, this study aimed to determine the legal status of Right to Water provided by the local government after the cancellation of Act No. 7 of 2014 on Water Resources. The object of this normative study includes legal principles and systematic. This is due to the focus of this study is the meaning of the right principle to ruled state in the context of realizing the peoples’ prosperity and the position of Water Resources Act as the basis for the issuance of Government Regulation and Right to Water. The results of study indicate that in order to provide legal certainty for permit holder for Right to Use Water and Right to Commercialize Water, the ministry has issued various ministerial regulations, although the nature of these regulations only fills a legal vacuum. In the case of permit to Use of Water Resources, all permits for use of water resources that use surface water issued before the decision of Constitutional Court No. 85/PUU-XI/2013 are still valid. To permit referred to it, evaluation is conducted based on 6 (six) the principles of water resources management. Request new permit are in the process or for renewal of permit to use water resources that use surface water, processed as 6 (six) principles of water resources management. Although, in order to ensure legal certainty, the government should immediately issues the Act in Lieu of Water Resources Management which will be the basis for water resources management in Indonesia.

scholarly journals Management model Management Model of Unda River in the Development of Traditional Village Based on Custom Village in Paksebali Village Klungkung Bali

2021 ◽  
Vol 2 (4) ◽  
pp. 394-403
Author(s):  
I Made Suwitra ◽  
I Wayan Subawa ◽  
Diah Gayatri Sudibya ◽  
I Wayan Arthanaya ◽  
Ni Putu Sawitri Nandari
Keyword(s):  
Surface Water ◽  
Rural Communities ◽  
Water Resources ◽  
Water Resources Management ◽  
Model Management ◽  
Management Model ◽  
Resources Management ◽  
Tourist Destinations ◽  
Legal Structure

This research is intended to identify the water resources management model carried out by Paksebali Village in the development of Tourism Villages in Klungkung Regency. Water resources (SDA) managemet in the development of tourism villages through coexistence between the Customary Villages and the Dinas (state) Villages which are oriented towards empowering rural communities for community welfare. So the Paksebali Village can coexit both the legal structure and the legal substance of the use of Unda River's surface water as a water attraction, restaurant, prewed in the development of new tourist destinations in Klungkung Regency through the development of a tourism village.

scholarly journals Legal Policy of Water Resources Management by Local Governments: A Review of Right to Water in Indonesia

2016 ◽  
Vol 1 (2) ◽  
pp. 250
Author(s):  
Nadia Astriani
Keyword(s):  
Surface Water ◽  
Water Resources ◽  
Water Resources Management ◽  
Local Governments ◽  
Management Policy ◽  
Constitutional Court ◽  
Legal Certainty ◽  
Normative Study ◽  
Resources Management ◽  
The Law

This study is based by the cancellation of Act No. 7 of 2004 on Water Resources by the Indonesian Constitutional Court. Over the past 10 years, the law is the basis for the water resources management in Indonesia. The cancellation of the law would provide great impact for water resources management policy, especially with regard to the provision of right to water. Hence, this study aimed to determine the legal status of Right to Water provided by the local government after the cancellation of Act No. 7 of 2014 on Water Resources. The object of this normative study includes legal principles and systematic. This is due to the focus of this study is the meaning of the right principle to ruled state in the context of realizing the peoples’ prosperity and the position of Water Resources Act as the basis for the issuance of Government Regulation and Right to Water. The results of study indicate that in order to provide legal certainty for permit holder for Right to Use Water and Right to Commercialize Water, the ministry has issued various ministerial regulations, although the nature of these regulations only fills a legal vacuum. In the case of permit to Use of Water Resources, all permits for use of water resources that use surface water issued before the decision of Constitutional Court No. 85/PUU-XI/2013 are still valid. To permit referred to it, evaluation is conducted based on 6 (six) the principles of water resources management. Request new permit are in the process or for renewal of permit to use water resources that use surface water, processed as 6 (six) principles of water resources management. Although, in order to ensure legal certainty, the government should immediately issues the Act in Lieu of Water Resources Management which will be the basis for water resources management in Indonesia.

Improvement of agriculture water resources management in large arid river basin through an integrated hydrological modeling approach

2020 ◽  
Author(s):  
Yong Tian
Keyword(s):  
Surface Water ◽  
Water Resources ◽  
River Basin ◽  
Water Use ◽  
Water Resources Management ◽  
Hydrological Cycle ◽  
Limited Data ◽  
Resources Management ◽  
Improved Model ◽  
Agriculture Water

<p>The ability to dynamically simulate the supply and demand of irrigated water in arid and semi-arid regions is needed to improve water resources management. To meet this challenge, this study developed an agriculture water resources allocation (WRA) module and coupled this module to an integrated surface water-groundwater model GSFLOW. The original GSFLOW, developed by USGS, is able to simulate the entire hydrological cycle. The improved GSFLOW with the WRA module allows the simulation, analysis and management of nearly all components of agriculture water use. It facilitates the analysis of agricultural water use when limited data is available for surface water diversion, groundwater pumpage, or canal information. It can be used to simulate and analyze historical and future conditions. The improved GSFLOW program was applied to the Heihe River Basin (HRB), which is the second largest inland river basin in China. The calibration and validation results of the program shows that the program is capable of simulating both hydrological cycle and actual agriculture water use with limited data. Then the model was used to analyze a set of agriculture water use scenarios, for example, limiting groundwater pumpage, adjusting water allocations between the middle stream and the lower stream. Based on these scenarios, it was found that the improved model could be used as a decision tool to provide better agriculture water resources management strategies. The improved model could be easily used in other basins.</p>

scholarly journals Reorganization of water demand under changing conditions with possibilistic programming

2014 ◽  
Vol 17 (2) ◽  
pp. 239-259 ◽  
Author(s):  
Mike Spiliotis ◽  
Luis Garrote ◽  
Adriana Chavez-Jimenez
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Water Productivity ◽  
Complex Problem ◽  
Water Withdrawal ◽  
Final Decision ◽  
Climate Change Scenarios ◽  
Resources Management ◽  
Availability Constraints ◽  
Possibilistic Programming

To adapt water resources management to changing conditions, the amount of water allocated to the different demands may be redistributed to satisfy water availability constraints. To achieve this, an interactive possibilistic programming procedure is proposed. The main criterion for the reorganization of water allocation to irrigation demands is net water productivity. To cope with uncertainty in problem formulation, the decision variables (amount of water allocated to each demand) are considered fuzzy triangular numbers. The proposed methodology is a combination of an intensive simulation process that determines the maximum cumulative potential water withdrawal with an interactive flexible possibilistic approach. The use of multicriteria techniques can be easily included within the interactive process in order to face the fuzziness of the water productivity term and to improve the final decision incorporating several dimensionals. The proposed method is applied to a real and complex problem, the Guadalquivir River Basin District in Spain, to identify an adaptive water resources management scheme that can react to the projected climate change scenarios by reorganizing the water allocated to irrigation demands.

Sign in / Sign up

Export Citation Format

Share Document