Water resources management in central northern Namibia using empirically grounded modelling

2012 ◽  
Vol 2 (2) ◽  
pp. 112-123 ◽  
Author(s):  
M. Zimmermann
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Large Scale ◽  
Driving Forces ◽  
Saline Groundwater ◽  
Water Supply Management ◽  
External Water ◽  
High Precipitation ◽  
System Variables

In this paper, a new methodology for the analysis and assessment of water supply regimes is presented. The problems of water supply management in developing countries are multidimensional and interdependent. Conventional methods, which only deal with separated and isolated issues, are not appropriate to deal with these problems. The method presented here, however, can comprehend the whole system. Therefore, using this method, conclusions for the management of adapted institutional and technological transformations can be drawn. In this study, relevant system variables of a problem context are identified, and their interdependencies are assessed and interpreted. This is done by using a method of qualitative interview analysis (grounded theory) and a cybernetic modelling approach (sensitivity analysis). In doing so, it is possible to identify outstanding variables which are essential to understand the system. These variables reveal the weakest links, driving forces, systemic stabilisers and the sustainability indicators of the system. The case study area is the Cuvelai-Etosha-Basin in central northern Namibia where a large-scale water supply system has been established. The water supply in the region is determined by the dependence on external water resources, high precipitation variability, absence of perennial rivers, saline groundwater, population growth and urbanisation.

Irrigation in the Medieval Islamic Fayyum: Local Control in a Large-Scale Hydraulic System

2012 ◽  
Vol 55 (1) ◽  
pp. 1-31 ◽  
Author(s):  
Yossef Rapoport ◽  
Ido Shahar
Keyword(s):  
Water Supply ◽  
Local Control ◽  
Water Allocation ◽  
Hydraulic System ◽  
Large Scale ◽  
Close Reading ◽  
Unique Case ◽  
Islamic Period ◽  
Distinctive Aspect

Abstract Because of the unique set of sources available, the Fayyum in Middle Egypt offers a unique case study of large-scale irrigation from antiquity to the Islamic period. A close reading of a cadastral survey of the province from 641/1243-4 shows that the distinctive aspect of the Islamic period was the local control of water supply and management. Drawing on the engineering experience of the villagers, water allocation and management in the gravity-fed canals of the Fayyum were in the hands of iqṭāʿ holders and tribal groups along the main canals, a pattern similar to that which pertained in mediaeval al-Andalus.

Evaluation of risk communication for rural water supply management: a case study of a coastal area of Bangladesh

2011 ◽  
Vol 14 (10) ◽  
pp. 1237-1262 ◽  
Author(s):  
Md. Atikul Islam ◽  
Hiroyuki Sakakibara ◽  
Md. Rezaul Karim ◽  
Masahiko Sekine
Keyword(s):  
Water Supply ◽  
Risk Communication ◽  
Coastal Area ◽  
Supply Management ◽  
Rural Water Supply ◽  
Water Supply Management ◽  
Rural Water

Decentralized Water Supply Management Model: a Case Study of Public Policies for the Utilization of Rainwater

2020 ◽  
Vol 34 (9) ◽  
pp. 2771-2785
Author(s):  
Suélen Fernandes ◽  
Mariele Canal Bonfante ◽  
Carla Tognato de Oliveira ◽  
Mauricio Uriona Maldonado ◽  
Lucila M. S. Campos
Keyword(s):  
Water Supply ◽  
Public Policies ◽  
Supply Management ◽  
Management Model ◽  
Water Supply Management

Performance indicators for water supply management

2015 ◽  
Vol 15 (4) ◽  
pp. 718-726 ◽  
Author(s):  
Ruggero Ermini ◽  
Rafet Ataoui ◽  
Lydra Qeraxhiu
Keyword(s):  
Water Supply ◽  
Performance Indicators ◽  
Water System ◽  
Supply System ◽  
Operating Conditions ◽  
Level Of Service ◽  
Water Supply Management ◽  
Specific Performance ◽  
Over Time

In the present study specific performance indicators are proposed that express the level of service of a water system subjected to varying operating conditions over time. The proposed methodology has been applied to a specific case study (Sinni water supply system in Basilicata – Italy) to demonstrate the real applicability of the proposed performance analysis that could be very useful to support the monitoring and the management activities.

scholarly journals Measures for reduction of the water losses in the distribution network: a case study on the municipality of Altônia/PR

2019 ◽  
Vol 23 ◽  
pp. 10
Author(s):  
Vitor Alécio Sevilha Gorzoni ◽  
Priscila Pini Pereira ◽  
Sandro Rogerio Lautenschlager ◽  
Cristhiane Michiko Passos Okawa
Keyword(s):  
Water Supply ◽  
Water Loss ◽  
Water Losses ◽  
Water Supply Management ◽  
Periodic Maintenance ◽  
Distribution Process ◽  
The Face ◽  
The Difference ◽  
Water Meters

The water losses management provides cost reduction for sanitation companies and, thus, for the treated and distributed water’s final users. In the face of the recent episodes of hydric crisis in the state of São Paulo, it is essential to have a good water supply management system, which includes controlling the water loss volume in the system. The easiest way to manage this control is based on the water balance, in other words, calculating the difference between the distributed volume and the volume measured in the consumption units. This work presents one case study at the municipality of Altônia, in Paraná, where the continuous expansion of the water supply system has led to the increase of the water loss volume on the distribution process. The municipality has chosen procedures as the appropriate and periodic maintenance of the network, installation of new water meters and pressure reduction valves and the monitoring of leakages with mechanical tools. Thus, it was possible to reduce the water loss volume by half.

scholarly journals Multi-objective Water Resources Optimum Allocation Scheme Based on Improved Standard Cuckoo Searching Algorithm (ISCSA)

2021 ◽  
Author(s):  
Ke Zhou
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Optimal Allocation ◽  
Optimal Solution ◽  
Local Optimum ◽  
Ecological Benefits ◽  
Multi Objective ◽  
Intelligent Optimization Algorithm ◽  
Water Resources Optimal Allocation

Abstract The standard cuckoo searching algorithm(SCSA)is a population intelligent optimization algorithm, which is also a new heuristic searching algorithm. The advantages of SCSA (such as convenient operation, heuristic searching, etc.) make it easy to find the optimal solution and maintain wider searching range. However, SCSA also has some drawbacks, such as long searching time, easy to fall into local optimum. In order to solve the problems existed in SCSA, in this paper, the improved standard cuckoo searching algorithm (ISCSA) was studied, which includes chaotic initialization and Gaussian disturbed algorithm. As a case study, taking economic, social and ecological benefits as the objective function, the multi-objective water resources optimal allocation models were constructed in Xianxiang Region, China. The ISCSA was applied to solve the water allocation models and the multi-objective optimal water supply scheme for Xinxiang region was obtained. The water resources optimal allocation schemes in the planning level year (2025) for 12 water supply sub-regions were predicted. The desirable eco-environment and benefits were achieved using the studied methods. The results show that the ISCSA has obvious advantages in the solution of water resources optimal allocation and planning.

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