3 edition of Soil erosion in the upper Mahaweli catchment Sri Lanka. found in the catalog.
Soil erosion in the upper Mahaweli catchment Sri Lanka.
Michael A. Stocking
by School of Development Studies, Unversity of East Anglia in Norwich
Written in English
|Series||Discussion paper -- no.226|
Abstract. The results of many studies have revealed that intensive farming on steep slopes, coupled with over application of fertilizers and accumulation of nutrients in downstream water bodies due to soil erosion, have contributed to environmental hazards in the Upper Mahaweli Catchment Area (UMCA) of Sri Lanka. Poverty, soil erosion and water quality; A case study in Kurundu Oya sub catchment of Upper Mahaweli Catchment, Sri Lanka. Journal of Social Sciences and Humanitiea, Rajarata University of Sri Lanka, – Amarasekara, M.G.T.S., N.D.K., Dayawansa, and W.P.R.P. De Silva, Effect of socio-economic factors on adoption of soil.
The chapter ‘Water, Land Use and Forests: The Upper Mahaweli Catchment’ provides facts and figures in relation to the Mahaweli River and information pertaining to forests, soil erosion, etc. While these are matters of considerable importance, the chapter would have been improved by being easier to read if more care had been paid in drafting : K. Upper Kotmale Hydropower Project: Another Disaster in Dam History Author: Withanage, Hemantha We have many good and bad experiences as the results of large scale Dams. In as a result of the Mahaweli project about 20% of the rice and about 55% of the Chilli consumption of the country were produced in the Mahaweli command area.
Sri Lanka’s water resources are critically important to sustain the country’s socio-ecological integrity and development goals. As such, the Government of Sri Lanka (GoSL) has initiated many watershed and water resources management programs focusing on various geographical areas of the country to address these Size: KB. UrbanStreamCorridors:Environmental statusandrestoraonstrategies:caseof& three&tributaries&in&Upper&Mahaweli&River& in&Sri&Lanka& LalithaDissanayake&.
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Information is given on erosion rates from different land uses in the Upper Mahaweli Catchment in Sri Lanka. Previous and on-going research was examined, and on-site assessments of erosion rates were carried out in the field using simple visual indicators.
Sediment transport in the river systems to Cited by: 4. (UOC) which is a sub-catchment of the Upper Mahaweli catchment. The Mahaweli watershed is the most important watershed in Sri Lanka since the size and the economic importance of it.
Hence, this study was conducted considering the ten selected sub-watersheds of Uma Oya Watershed (UOW) in Sri Lanka to quantify soil erosion. Effect of land use in the upper Mahaweli catchment area on erosion, landslides and siltation in hydropower reservoirs of Sri Lanka.
Quantification of human-induced soil loss is an imperative measure in catchment management. Among the catchments in Sri Lanka, the highest sediment yield has been reported from the Upper Uma Oya catchment (UOC) which is a sub-catchment of the Upper Mahaweli catchment. The Mahaweli watershed is the most important watershed in Sri Lanka since the Author: B.
Dias, E. Udayakumara, J. Jayawardana, S. Malavipathirana, D. Most of the water for the agricultural and hydropower developments in the Accelerated Mahaweli Development Program originates in the upper catchment of the Mahaweli Ganga, so the reforestation programme is a major facet of catchment management to provide an opt.
water supply - and also to supply fuelwood, fibre and by: 2. Downloadable. This paper estimates the benefits and costs of soil conservation in the Upper Mahaweli Watershed of Sir Lanka. The costs of soil erosion control include the implementation costs of control measures, while the benefits are reductions in the costs of soil erosion.
In contrast to many studies in developed countries, the on‐site benefit of soil erosion control in Sri Lanka. Effectiveness of Soil Conservation in Mahaweli Catchment, Sri Lanka: A Case Study from Uma Oya Sub Catchment Saranga Diyabalanage 1,*, Sandun Illangasinghe 1.
Geologically, the Upper Mahaweli catchment area lying in the Highland Complex of Sri Lanka mainly consists of granulite grade metasedimentary and meta-igneous rocks, belonging to the early Proterozoic (Cooray, ).Cited by: The Impact of Inappropriate Soil Management on River Water Quality: A Case Study in the Kurundu Oya Sub-catchment of the Upper Mahaweli Catchment, Sri Lanka.
dynamics of water chemistry of streams in the Middle Himalayas in Nepal occur during the monsoon due to surface runoff and the return ﬂow from agricultural lands. consequence of the loss of upper soil layers, which are rich in nutrients.
The impacts of soil erosion off-site ‘include sedimentation of waterways and eutrophication of water bodies, as well as sediment-related damage to roads and houses’ (Blanco-Canqui and Rattan, ). Soil erosion in Sri Lanka is a serious problem.
The Upper Mahaweli Catchment (UMC) is a very important watershed in the Central Highlands of Sri Lanka since it contains a series of multipurpose reservoirs. Hence, conservation of soil in the UMC should be given the highest priority to reduce sediment yields in streams and to maintain the storage capacities of hydropower by: 9.
We present an approach to investigate the pre-human natural background erosion by using in situ-produced cosmogenic 10Be. The island of Sri Lanka is ideally suited for such a study: the Upper Mahaweli catchment is uniformly underlain by crystalline rocks; uplift rates are minimal, therefore very low natural erosion is expected.
The highlands drained by the catchment are. A part of this area was in the Wet Zone and a part in the Dry Zone. The problem of drought is particularly severe in the Dry Zone where the failure of rains. in the main cultivation season, September to March can spell disaster to thousands of.
families depending on rainfed agriculture for their livelihood. Effect of land use in the upper Mahaweli catchment area on erosion, landslides and siltation in hydropower reservoirs of Sri Lanka.
Journal of the National Science Foundation of Sri Lanka, Cited by: The results of many studies have revealed that intensive farming on steep slopes, coupled with over application of fertilizers and accumulation of nutrients in downstream water bodies due to soil erosion, have contributed to environmental hazards in the Upper Mahaweli Catchment Area (UMCA) of Sri Lanka.
The Mahaweli Authority of Sri Lanka (MASL) implemented the UMWP for soil conservation and watershed management purposes in coordination with other implementing agencies.
Activities included the promotion of SALT technology, sericulture, drafting conservation plans and promoting mixed farming of crops and livestock. Gunawardena M.P., Najim M.M.M. () Adapting Sri Lanka to Climate Change: Approaches to Water Modelling in the Upper Mahaweli Catchment Area.
In: Leal Filho W. (eds) Climate Change Research at : M. Gunawardena, M. Najim. Ministry of Agriculture Sri Lanka. Agri Development ; Agri Input Management; Agri Service and Agrarian Development. Soil erosion from land surfaces is a major problem worldwide including Sri Lanka, especially in the Kelani river catchment.
Kelani river basin is home to around 25% of the Sri Lankan population. The river is primary source of drinking water to over 4 million people living in the capital city - greater Colombo and o industries and Author: M.P.
Gunawardena, R. Thuda Hewage. The use of contour hedgerows of woody legumes to control soil erosion has been promoted amongst smallholders in the Upper Mahaweli catchment of Sri Lanka since Cited by: 9. This study investigates the variation of seasonal streamflow and streamflow extremes in five catchments of the Mahaweli River Basin (MRB) Sri Lanka from toand the relationship between streamflow and seasonal rainfall in each catchment is then examined.
Furthermore, the influence of Indian Ocean Dipole (IOD) and El Nino and Southern Oscillation Author: Sherly Shelton, Zhaohui Lin.The Mahaweli river is the longest in Sri Lanka, with the upper catchment covering an area of.
The Mahaweli Development programme, a major undertaking in the upper catchment has been implemented with the aims of providing Mahaweli water to the dry zone of the country through a massive diversion scheme and also for generating Author: Ranjith Premalal de Silva.The Mahaweli Development Programme is a water resource-based multi-purpose development project in Sri Lanka and the Upper Mahaweli Catchment (UMC) in the Central Highlands receiving a high amount of rainfall.
This paper based on secondary data examines the relationship between rainfall, relative humidity, stream flow of the UMC namely and paddy production at Mahaweli.