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  • 1
    Publication Date: 2020-09-21
    Description: The role of a drinking water distribution network (DWDN) is to supply high-quality water at the necessary pressure at various times of the day for several consumption scenarios. Locating and identifying water leakage areas has become a major concern for managers of the water supply, to optimize and improve constancy of supply. In this paper, we present the results of field research conducted to detect and to locate leaks in the DWDN focusing on the resolution of the Fixed And Variable Area Discharge (FAVAD) equation by use of the prediction algorithms in conjunction with hydraulic modeling and the Geographical Information System (GIS). The leak localization method is applied in the oldest part of Casablanca. We have used, in this research, two methodologies in different leak episodes: (i) the first episode is based on a simulation of artificial leaks on the MATLAB platform using the EPANET code to establish a database of pressures that describes the network's behavior in the presence of leaks. The data thus established have been fed into a machine learning algorithm called random forest, which will forecast the leakage rate and its location in the network; (ii) the second was field-testing a real simulation of artificial leaks by opening and closing of hydrants, on different locations with a leak size of 6 and 17 L s−1. The two methods converged to comparable results. The leak position is spotted within a 100 m radius of the actual leaks.
    Print ISSN: 1996-9457
    Electronic ISSN: 1996-9465
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Copernicus on behalf of Delft University of Technology.
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/15595 | 115 | 2014-11-19 08:45:51 | 15595 | WorldFish Center
    Publication Date: 2021-07-08
    Description: Cambodia’s recent freshwater fishery sector reform, instigated at the top level of government, is one of the country’s most significant contemporary policy developments addressing natural resources management and rural development. Implemented in two main waves, the reforms culminated in the complete removal of inland commercial fishing lots. Yet serious problems still need to be addressed, including reportedly widespread illegal fishing, difficulties in protecting critical habitats, and competition among state agencies over resource management authority. This report summarizes the context of the recent fishery reforms, analyzes challenges and opportunities for policy implementation after the reforms, and details the outcomes of local institutional innovations in Kampong Thom Province, followed by a discussion of the implications for ongoing efforts aimed at reducing resource conflict and building livelihood resilience.
    Description: Collaborating for Resilience
    Keywords: Agriculture ; Aquaculture ; Aquatic Agricultural Systems ; Aquatic resources ; Capacity development ; Co-management ; Environmental policy ; Environmental protection ; Equity ; Fisheries management ; Fresh water ; Governance ; Illegal fishing ; Law and regulation ; Livelihoods ; Monitoring and evaluation ; Natural resource management ; Participatory action research ; Partnerships ; Policy ; Research ; Resilience ; Cambodia ; Asia
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 25
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    Training Department, Southeast Asian Fisheries Development Center | Samut Prakarn, Thailand
    In:  http://aquaticcommons.org/id/eprint/26226 | 17342 | 2019-02-14 01:35:41 | 26226 | Southeast Asian Fisheries Development Center, Training Department
    Publication Date: 2021-07-24
    Description: Fisheries in plays a very important role in Cambodia’s national economic development. Total fish catch production in 1996 was 104 310 tones, about which 60% was contributed by inland capture fisheries, 30% by marine capture fisheries and 10% by both inland and marine aquaculture (Fish catch in Cambodia 1980-1996). Even inland capture fisheries have contributed high production we also always pay attention to our marine capture fisheries which have provided its enormous production to our country. Our coastal line extends 435 km from Thai border in the Northwest to Vietnamese border in the Southeast with Exclusive Economic Zone area of 69, 900 square miles. (Map of the marine fishing ground). The main living animal aquatic species: fish (mackerels, sardine, anchovies, bonito, flatfish, snapper, threadfin, etc., (main marine aquatic catch in 1996). 1. Fishing gears: There are two types of marine fishing gear in our country small scale family fishing gear and commercial fishing gear. For the commercial fishing gear, the most popular ones are purse seine and bottom trawl. (Marine fishing gears in 1996); 2. Fishing boats: In 1996 fishing boat increases until 4914 units, which 1602 units are motorized boats and 3312 units are unmotorized ones. However, they are not modern, and they do not have any modern equipment such as radar, echo-sounder (fish finder), sonar sounder, power block, net hauler and refrigeration system, (marine fishing boat in 1996); 3. Marine fishers: Total marine fishers in four provinces in 1996 are 68745 persons (24 464 families) slightly increases from 1995. Most of them are poor; they get their small income from their fishing activity. (Marine fishers in 1995 and 1996); 4. Marine fishing policy: Department of Fisheries has its own fisheries law and policy to deal with all kinds of fisheries activities in our country sustainably. It contains many articles that all fishers have to respect, as following; 5. Fishing constraint: Even we have strict fisheries law, but we still face many problems because of illegal fishing are carrying out in the whole country and damaging our natural aquatic resources. The constraints are the following; 6. Fisheries planning: Facing difficulty and problems with the aims of fisheries development and management the Department of Fisheries has its five-year planning and projects, in the following. The Department of Fisheries has achieved its advancement during the last 16 years and faced many problems to be solved in the future. Due to 20 years of civil war, our government has a limited budget for spending on the fisheries sector including insufficient of its human resource. So we would like to take this opportunity to have some suggestions, if possible, to the workshop, to other organizations to provide us short and long course training on fisheries sector and resources development and management in a sustainable way, and one more is cooperation in oceanographic scientific research. The last assist us by providing technology document.
    Keywords: Fisheries ; Fisheries ; Artisanal fisheries ; Inland fisheries ; Marine fisheries ; Economic benefits ; Commercial species ; Aquaculture ; Aquaculture development ; Fishery management ; Fishery resources ; Resource management ; Exclusive economic zone ; Fishery regulations ; Fishery policy ; Fish ; Fishery development ; Fishing gear ; Fishing ; Fishing vessels ; Fishers ; Fishery industry
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 152-160
    Format: 9
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