Dredging, Excavation & Deepening of Reservoirs
Introduction

Sri Lanka an island nation in the Indian Ocean is blessed with two Monsoons. The South – West Monsoon (SWM) which brings a large volume of water from May to September and The North – East Monsoon (NEM) which brings a small quantity of water to the country.The Northern, North Central and the part of Southern Sri Lanka benefitted from NWM and the rest of the island benefitted from SWM. The northern part of the gets very less rain and long period of the year prevails as a dry spell.

The island is basically an agricultural country. The main crop cultivated is paddy and cultivation is designed in such a way as Yala and Maha two seasons in accordance with the monsoonal reasons.The Northern Sri Lanka although gets a less precipitation the flat fertile lands ideal for agricultural purposes. Therefore it is so important to construct a body to collect and accommodate water during the rainy season. This vital factor has well been recognized by the rulers during the Monarchial Period and had come out with a very viable proposal to construct a set of reservoirs in three categoriesthat is large, medium and small mainly in the dry zone of the island.

Goal and the Objectives

In realization of the project it is expected that the economy of the rural communities especially in the northern Sri Lanka will be strengthen and their standard of living will also be upgraded.

  • Support the government proposal suggested by His Excellency the President and the Hon. Prime Minister to improve the living standards of the rural communities.
  • Minimize the flood menace prevailing during the rainy season in the rural low lying areas of the island.
  • Assure the availability of required quantity of water for paddy cultivation during the Yala and Maha seasons.
  • Assure the maximization of paddy production and ensure the food and food availability for Sri Lankan communities.
  • Promote organic farming and Integrated Pest Management in Paddy Cultivation.
Methodology

The CSS Construction Company Pvt. Ltd. Willingly makesthe investment to fulfill the aspirations of His Excellency the President and the Hon. Prime Minister in line with the plan and the program designed to dredge, excavate and deep the reservoirs when and where necessary to enhance the carrying capacity of the water body enabling accommodate more water which could be used for agricultural purposes.

The dredged materials will be sorted out for organic matter, water plants, silt, clay and sand. The sand will be sold to the private sector for construction industry. The clay will also be sold to the pottery industry. Organic dead materials and the water weeds will be converted as organic conditioner to be used as a compost fertilizer in paddy cultivation and fruit & vegetable cultivation. Thereby it is expected to recover the investment.

Justification

The reservoir system in Sri Lanka plays an important role in agriculture especially in paddy cultivation in the dry zone of the island where very less perspiration receives during the North – West Monsoon period. Therefore it is so important to minimize waste and accommodate in a reservoir to be used in the dry spell.Most of the reservoirs got silted and the carrying capacity dropped down severely. It has hampered the paddy production due to inadequate and shortage of water supply. The only option is to dredge and excavate where necessity arise.

The project will help to minimize the flood problem in the northern, eastern and north central provincesof the country. No doubt the project will increase the paddy production of the island if all the other external factors prevail favorable. In considering all these factors it is reasonable to conclude the project will enhance the living conditions of poor farmer communities in theproject area due to minimization of losses connected to flood and increase paddy production that in turn strengthen their economy. Therefore it is strongly believed that the proposed project will be economically viable, socially acceptable, economically feasible and environmentally friendly

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