PROCEEDINGS OF ANNUAL WORKSHOP

Transcription

1 PROCEEDINGS OF ANNUAL WORKSHOP Guideline No. : NWSDB / RWS / GUI / 13 NATIONAL WATER SUPPLY AND DRAINAGE BOARD Prepared by Third ADB Assisted Water Supply Sanitation Sector Project December 2008 Table of Contents 1

2 1 Introduction Presentation of Technical Factors on Maps 4 2 Presentation Details Formal Requirements 5 3 Data Collection 8 2

3 List of Abbreviations: ADB : CBO : DIU : DLCC : DM : DS : GND : GOSL : NGO : NWSDB : O & M : PIU : PMU : PO : PS : Rs. : RWS : RWSS : USD : WSS : Asian Development Bank Community Based Organisation Divisional Implementation Unit Divisional Level Co-ordinating Committee District Manager of NWSDB Divisional Secretary Grama Niladhari Division(s) Government Of Sri Lanka Non-Government Organisation National Water Supply & Drainage Board Operation and Maintenance Project Implementation Unit Project Management Unit Partner Organisation Pradeshiya Sabahs Sri Lanka Rupees Rural Water Supply Section of the NWSDB Rural Water Supply and Sanitation United States Dollars (1 USD ~ 70 Rs.) Water Supply and Sanitation 3

4 1 Introduction In the process of selecting the communities which will be targeted for assistance under the ADB financed Third Water Supply and Sanitation (Sector) Project, the applications from the interested communities have already been received at present in the each district (PIU). The next steps in the process will be; Preparation of a PS division-wise ranking list of the communities based on an agreed selection criteria1, and Finalisation of the ranking list at Divisional Level workshops (DLCC level) In order to arrive at an acceptable final list a participatory approach must be adopted. Consequently, discussions need to be held at workshops to obtain views of participants. The participants in the workshops need to consider technical, social, economical and financial factors in order to make necessary adjustments to the list and reaching a consensus. 1.1 Presentation of Technical Factors on Maps The technical factors such as the current water supply situation, details of planned water supplies, population densities, development trends, availability of sustainable water resources and the quality of water should be considered in the selection process. In order to present these facts and figures at the workshop, a comprehensive, but concise and simple method should be adopted. The accurate presentation of the relevant details will guide the workshop participants to make the correct decisions in the selection the communities. Further, this will support any views and ideas evolved and presented at the workshop by the Project staff. For this purpose, the relevant details presented on district wise maps are considered convenient and easy to understand by the participants. In these Guidelines a method for preparation of these maps and collection of basic data for this purpose is suggested. The maps thus prepared could be used for subsequent planning of community water schemes, and also would be the initial step of preparing more comprehensive macro level water resources planning maps. 4

5 2 Presentation Details The presentation of details is proposed to be with three maps; The following general guidelines apply to all maps and drawings prepared for District Level Workshops and Water Resources Planning: 2.1 Formal Requirements In order to create uniformity of drawings and maps prepared within the individual district and within all six districts it is suggested to establish a modest number of formal requirements all maps/drawings for this purpose have to follow. The formal requirements are suggested as follows: Scale must be 1: 50,000 The format of the map must be recognised A format, preferably A 2 or A 1. However, deviation from A2 and A1 is acceptable if such deviation serves the purpose of displaying the information in a clearer manner. However, there is no allowance for other formats than A formats The map/drawing must use cage (to be finalised) The legend must be standard (to be finalised) The map must be approved by the following before authorization to use the maps/drawings can be given by the District Manager. Authorisation is given by DMs signature on the map/drawing. The approval procedure should be seen as a quality assurance procedure by which the various persons involved in the approval are required to check and correct the maps/drawings in order to increase quality. The approval is to be given by: Senior Engineer, Hydro geologist and District Manager. 5

6 Map 1 Existing Water Supply Situation This map could be to scale 1:50,000 and the maps could include various details. The maps can be produced based on a topographical map supplemented by various overlays; Location and extent of existing water supply schemes (with the boundaries of service area) Additional areas around the existing schemes, which could be covered with extensions of distribution system Location and extent of proposed water supply schemes Locations of high yielding deep wells constructed by NWSDB/WRB Location of deep wells with hand pumps ( if possible) Location of rivers and streams, with remarks written on the map about the reliability and the possibility of utilizing them. Location and extent of irrigation tanks, main irrigation canal systems, water bodies, with remarks written on the map about the reliability of these and possibility of utilizing them. Locations of any future irrigation tanks, canal systems Areas suitable (or unsuitable) for rainwater harvesting Areas possible for wind power driven pumping (identified high wind belts) Map 2 Water Quality This should be prepared basically for ground water. But remarks regarding the quality of major surface water sources also should be included. The map should contain the contours of the following parameters, based on the ground water quality records; Iron (with contours indicating the ranges, based on the availability of data. The SLS standards for drinking water indicate maximum acceptable level as 0.3ppm, and maximum allowable as 1.0 ppm. However, in areas of high occurrence of iron, less than 2.0 ppm could be considered as satisfactory) Fluoride (with contours indicating the ranges based on availability of data. The SLS standards indicate a maximum acceptable level as 0.6ppm and maximum allowable as 1.5 ppm ) Hardness (with contours indicating the ranges based on the availability of data. The SLS standards indicate a maximum acceptable level of total hardness as 250 ppm, and maximum allowable as 600 ppm) Apart from above, based on the local information, mark the areas with occurrence of high salinity in shallow ground water. Map 3 Population / Development 6

7 The map should contain the following; GND wise population densities ( marked in suitable ranges) Locations of major town centres Locations of identified small towns, with approximate area Identified areas of development activities such as BOI Projects, new settlements, industrial estates, other special projects Plantations and forest areas Future development projects When assessing the population densities, it should be based on the (roughly assessed) habitable area of the GND, not the total area. However, the entire GND area should be marked on the map with the same pattern of markings. Preparation of the maps at 1:50,000 scale would be appropriate, as most of the data are available in that scale. However, for some districts, this implies the need of preparing the maps in parts. The maps prepared on transparent sheets (tracing paper or sepia prints ) would make it possible to overlap and view them together. 7

8 3 Data Collection The data to be collected for the preparation of the above and the sources of data are indicated below, as a guidance to the District Manager and Senior engineer. Item Institution to be Remarks Contacted Details of existing water supply schemes RSC Local Authorities IRDP/Plantation authorities, Sarvodaya and other NGOs Possible Extensions of above - do - Proposed WS schemes NWSDB Design office RSC Local Authorities IRDP office Rivers, Streams, lakes Identified spring water sources with high yield Topo sheet Local Authorities Already avail-able data with DM Mark the reliability based on the flow data already obtained Location of bore holes(high yielding and other) GW Section Water Resources Board (WRB) Bore holes with yields more than 100 lps to be marked 8

9 Irrigation systems, water bodies Future irrigation projects Dept. of Land Use Planning, District office Dept. of irrigation, DD s office Dept. of irrigation, DD s office Obtain the pattern of water issues, possibility of using irrigation tanks for any WS schemes GN Division Map Planning, district office Dept. of Land Use Areas of the GNDs - do GN Population figures Planning, offices Dept. of Land Use district office AD (Planning), DS Forest areas, plantation areas Planning, Development areas Offices Director(Planning), New townships Industrial projects district Dept. of Land Use district office Assistant Director, (Planning), DS Kachcheri IRDP Special projects Diretor(Planning), Kachcheri District offices of UDA\Town & Country Planning Dept. of Indus-tries, office 9