Your search found 12 records
1 Weligamage, Parakrama; Barker, Randolph; Hussain, Intizar; Amarasinghe, Upali; Samad, Madar. 2002. World irrigation and water statistics 2002: with a guide to data sources. Colombo, Sri Lanka: International Water Management Institute (IWMI) 131p.
Statistics ; Irrigable land ; Cereals ; Prices ; River basins ; Dams ; Tube wells ; Public ownership ; Private ownership
(Location: IWMI-HQ Call no: IWMI 631.7 G000 WEL Record No: H030388)
(6.20 MB)
2 Weligamage, Parakrama; Barker, Randolph; Hussain, Intizar; Amarasinghe, Upali; Samad, Madar. 2002. World Irrigation and water statistics 2002: with a guide to data sources. Colombo, Sri Lanka: International Water Management Institute (IWMI) 131p.
(Location: IWMI HQ Call no: IWMI 631.7 G178 WEL c2 Record No: H041559)
3 Namara, Regassa E.; Weligamage, Parakrama; Barker, Randolph. 2003. Prospects for adopting system of rice intensification in Sri Lanka: a socioeconomic assessment. Colombo, Sri Lanka: International Water Management Institute (IWMI). vi, 46p. (IWMI Research Report 075) [doi: https://doi.org/10.3910/2009.077]
Models ; Rice ; Paddy fields ; Irrigated farming ; Rain-fed farming ; Poverty ; Farmers / Sri Lanka / Ratnapura / Kurunegala / Kalthota Irrigation System
(Location: IWMI-HQ Call no: IWMI 631.7.1 G744 NAM Record No: H034854)
(820KB)
Today, there is an increasing worldwide interest in assessing the potential for maintaining or increasing rice yields by reducing or eliminating the use of chemicals and by decreasing irrigation requirements. The System of Rice Intensification (SRI) first developed in Madagascar and now being tested in many countries, is an example of such an approach. The system is based largely on organic farming principles and additional requirements for spacing and the transplanting of seedlings.
4 Anputhas, Markandu; Ariyaratne, B. Ranjith; Gamage, Nilantha; Jayakody, Priyantha; Jinapala, Kiribandage; Somaratne, Pallewatte G.; Weligamage, Parakrama; Weragala, Neelanga; Wijerathna, Deeptha. 2005. Bringing Hambantota back to normal: a post-tsunami livelihoods needs assessment of Hambantota District in southern Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI). ix, 59p.
Natural disasters ; Research methods ; Mapping ; Villages ; Income generation ; Statistics ; Irrigated farming ; Livestock ; Fisheries ; Economic aspects ; Rehabilitation / Sri Lanka / Hambantota
(Location: IWMI-HQ Call no: IWMI 363.348068 G744 ANP Record No: H036747)
(2.74 MB)
5 Namara, Regassa; Bossio, Deborah; Weligamage, Parakrama; Herath, Indika. 2008. The practice and effects of the System of Rice Intensification (SRI) in Sri Lanka. Quarterly Journal of International Agriculture, 47(1): 5-23.
(Location: IWMI HQ Call no: IWMI 633.18 G744 NAM Record No: H041467)
In Sri Lanka rice is grown under conditions of sub-optimal water and land availability. Thus, innovations such as the System of Rice Intensification (SRI) that can increase productivity and save resources are needed. The objective of this study was to understand how SRI was implemented on farms in Sri Lanka, and the consequences of changes in practices on: 1) input utilisation, 2) agronomic traits of rice, and 3) soil chemical properties. It was found that SRI farmers had made significant changes in their production systems: irrigations, seeding rates and herbicide usage were reduced by 24%, 85% and 95%, respectively, and plant spacing was increased by 60%. Total inputs of nitrogen, phosphorus, and potassium were similar across SRI and conventional plots, but the source of nutrients was different. Yields were variable, but significantly higher on SRI farms, soil available potassium and phosphorus were increased, and SRI plants exhibited tolerance to low moisture stress.
6 Namara, Regassa E.; Giordano, Meredith; Amerasinghe, Priyanie H.; Boelee, Eline; Weligamage, Parakrama; Weerasinghe, A.; Jayanetti, S. R.; Yapabandara, A. M. G. M. 2008. An impact assessment of malaria control through environmental and irrigation water management. Ceylon Journal of Science (Biological Sciences), 37(1):107-128.
Malaria ; Control methods ; Impact assessment ; Waterborne diseases ; Public health ; Environmental management ; Irrigation management ; Surveys ; Villages ; Households ; Models / Sri Lanka / Anuradhapura District / Upper Yan Oya Catchmeny / Huruluwewa Watershed
(Location: IWMI HQ Call no: IWMI 614.532 G744 NAM, PER Record No: H041543)
7 Weligamage, Parakrama; Shumway, C. R.; Blatner, K. A.; Butcher, W. R.; Giordano, Mark. 2009. Production function for rice in Kirindi Oya major irrigation system in Sri Lanka. [Abstract only]. In Abeyratne, F.; Ariyawardana, A. (Eds.). Third Annual Research Forum of the Sri Lanka Agricultural Economics Association (SAEA), held at the Hector Kobbakaduwa Agrarian Research and Training Institute, Colombo 7, Sri Lanka, 2 October 2009. Colombo, Sri Lanka: Hector Kobbakaduwa Agrarian Research and Training Institute (HARTI) pp.1.
Irrigation systems ; Rice ; Fertilizer application ; Farm income / Sri Lanka / Kirindi Oya Irrigation and Settlement Project
(Location: IWMI HQ Call no: e-copy only Record No: H042412)
(0.07 MB)
8 Weligamage, Parakrama; Butcher, W. R.; Blatner, K. A.; Shumway, C. R.; Giordano, Mark. 2009. Non-user benefits emanating from enhanced water flow to Yala Protected Area Complex. [Abstract only]. Paper presented at the Water for Food Conference: national conference addressing water management issues, food security, environment and climate change in Sri Lanka, organized by the International Water Management Institute, Irrigation Department (Sri Lanka), Department of Agriculture (Sri Lanka), Hector Kobbekaduwa Agrarian Research and Training Institute, held at the Bandaranaike Memorial International Conference Hall, Colombo, Sri Lanka, 9 - 11 June 2009. 2p.
Ecosystems ; Water resource management ; Multiple use ; Decision making ; Water allocation ; Environmental flows / Sri Lanka / Menik Ganga / Veheragala Reservoir Project / Yala Protected Area Complex
(Location: IWMI HQ Call no: e-copy only Record No: H042632)
(0.05 MB)
9 Weligamage, Parakrama. 2009. Willingness to pay for enhancement of natural ecosystems: the case of Yala Protected Area Complex. [Abstract only]. In Wattuhewa, I. D. (Ed.). Annual Symposium 2009, Exploring New Spheres for a Better Future, held at the Kotelawala Defence University (KDU), Ratmalana, Sri Lanka, 4 December 2009. Abstracts of contributed papers. Ratmalana, Sri Lanka: General Sir John Kotelawala Defence University. pp.28.
Ecosystems ; Nature reserves ; Protected areas / Sri Lanka / Yala Protected Area Complex / Menik Ganga River
(Location: IWMI HQ Call no: e-copy only Record No: H042811)
(0.07 MB)
10 Weligamage, Parakrama; Butcher, W. R.; Blatner, K. A.; Shumway, C. R.; Giordano, Mark. 2010. Non-user benefits emanating from enhanced water flow to the Yala Protected Area Complex. In Evans, Alexandra; Jinapala, K. (Eds). Proceedings of the National Conference on Water, Food Security and Climate Change in Sri Lanka, BMICH, Colombo, Sri Lanka, 9-11 June 2009. Vol. 2. Water quality, environment and climate change. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.37-47.
Water use ; Multiple use ; Wildlife ; Habitats ; Ecosystems ; Irrigation water ; Water allocation / Sri Lanka / Yala Protected Area Complex / Menik Ganga / Veheragala Reservoir Project
(Location: IWMI HQ Call no: IWMI 631.7 G744 EVA Record No: H042857)
Water is a multiple use resource. Increasing scarcity and competition from various sectors is an important dimension to be considered in its management. Understanding the value of water to different water uses is, therefore, necessary to assist decision-making in water allocation among sectors. Although water used in agriculture can be valued using production function approaches, such direct valuation methods are not available for the environmental uses of water. This paper uses non-market valuation methods to estimate the economic value of a committed flow through a unique ecosystem, the Yala Protected Area Complex (YPC). The Yala Protected Area Complex is an important wildlife refuge situated in south-eastern Sri Lanka. Its large land extent, undisturbed nature, and abundance and diversity of fauna contribute to its uniqueness. The fact that the YPC is also the most visited national park in Sri Lanka is partially a result of this uniqueness. However, maintenance of the park’s ecosystem depends on the flow of the Menik Ganga. This flow is regulated by the Veheragala Reservoir Project, and there is now discussion of reducing flow into the park by about half of the current level. The proposed plan ensures dry season flow into the YPC and, therefore, has been deemed acceptable. However, there is a possibility that farmers will demand further water releases during the dry season which could in turn endanger the planned downstream water releases. So there is a potential trade-off between environmental and irrigation uses of water. A willingness to pay (WTP) survey was conducted in ten districts in Sri Lanka during the fourth quarter of 2008 to estimate the WTP of the general population of the country towards maintaining this important environmental resource. In the hypothetical market presented, participants were told of the need for financial contributions from the general public to ensure the release of a minimum downstream flow commitment of 50 MCM. Participants were also informed of how this flow would enhance the ecosystem of the YPC. A single bound dichotomous choice contingent valuation approach was used as the elicitation format. Nonobligatory voluntary contributions were solicited towards a trust fund that could be used to ensure release of the required quantity of water downstream during dry months. According to the results of a binary logistic regression, income, age, and religious attachments are important factors affecting the decision to contribute to environmental flow maintenance to the YPC. Sixty-five percent of respondents were willing to pay something to ensure the maintenance of an adequate environmental flow in the YPC. The estimated mean WTP for water releases to enhance the YPC is Sri Lankan Rupees (SLR) 435 per year. Over the requested payment horizon of 10 years, the present value of aggregate WTP from the Sri Lankan population to enhance the ecosystem of the YPC is SLR 12 billion. This quantity greatly surpasses the present value of net benefits from rice farming estimated at SLR 0.64 billion, which would be generated if the same quantity of water was used for irrigation for 10 years (assuming current prices and input intensities). Thus, there is a clear opportunity for national welfare gain by ensuring adequate flow in YPC.
11 Weligamage, Parakrama; Godaliyadda, G. G. A.; Jinapala, K. (Eds.) 2010. Proceedings of the National Conference on Water, Food Security and Climate Change in Sri Lanka, BMICH, Colombo, Sri Lanka, 9-11 June 2009. Vol. 1. Irrigation for food security. Colombo, Sri Lanka: International Water Management Institute (IWMI). 160p. [doi: https://doi.org/10.3910/2010.210]
Food security ; Climate change ; River basins ; Water shortage ; Irrigated farming ; Water quality ; Tanks ; Aquatic plants ; Rice ; Food insecurity ; Water resource management ; Zero tillage ; Weed control ; Agroforestry ; Canals ; Surface runoff ; Remote sensing / Sri Lanka / Deduru Oya Basin / Anuradhapura District / Mi Oya River Basin / Inginimitiya Irrigation System / Yan Oya watershed / Aluth Divulwewa sub watershed
(Location: IWMI HQ Call no: IWMI 631.7 G744 WEL Record No: H042888)
(2.97 MB)
This is the first volume on the proceedings of the national conference on ‘Water for Food and Environment’, which was held from June 9–11, 2009 at the Bandaranaike Memorial International Conference Hall (BMICH). The volumes two and three have been produced as separate documents of this report series. In response to a call for abstracts, 81 abstracts were received from government institutes dealing with water resources and agriculture development, also from universities, other freelance researchers and researchers from the International Water Management Institute (IWMI). Forty Seven of the eighty-one abstracts that were submitted were accepted for compiling full papers. In the past couple of years the sharp increase in food prices worldwide has raised serious concerns about food security, especially in developing countries. To effectively address these concerns a holistic approach is required that encompasses improved agricultural water productivity, adaptation to climate change, targeted and appropriate institutional and financial measures, and a consideration of environmental issues. The main purpose of the conference was to share experiences in these areas and to find opportunities to improve farmers’ incomes and food production, and to promote environmentally sustainable practices in Sri Lanka in the face of growing water scarcity and the challenges of climate change.
12 Mukherji, Aditi; Fuleki, Blanka; Shah, Tushaar; Suhardiman, Diana; Giordano, Mark; Weligamage, Parakrama. 2010. Irrigation reform in Asia: a review of 108 cases of irrigation management transfer. Report submitted to the Asian Development Bank, October 2009. 118p.
Irrigation management ; Privatization ; Policy ; Case studies ; Indicators ; Analysis ; Common property ; Irrigation schemes ; Farmer-agency interactions ; Water user associations / Asia
(Location: IWMI HQ Call no: e-copy only Record No: H042851)
https://data.opendevelopmentmekong.net/dataset/a2022053-b870-411d-902a-76cf3e135132/resource/9c9a21ca-bcb3-4cc8-8aa9-e00bf5d96b68/download/2aab15ae-bec6-440c-9aca-47c4cea21542.pdf
https://vlibrary.iwmi.org/pdf/H042851.pdf
https://vlibrary.iwmi.org/pdf/H042851.pdf
(2.36 MB) (2.35MB)
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