Aquatic ecosystems

Sri Lanka has one of the oldest traditions of irrigation in the world. The economy and human settlements of early Sri Lankan society were organized around the ancient water tank (water storage reservoir) irrigation systems. These traditional tank systems thus form a vital component of both the natural and manmade landscape in Sri Lanka.

Wetlands are vital to the livelihoods of hundred of millions of people residing in the Lower Mekong region, and particularly to the food security of many of the rural poor. This document reports on a study whose aim was to provide guidance on the use of environmental economic assessment methodologies to support wetlands management for poverty alleviation.

Water ecosystems have long been perceived by decision makers as having little value simply because their economic value is poorly understood and rarely articulated. Calculating the economic value of an ecosystem is a means of providing information which can be used to make better and more informed choices about how resources are managed, used and allocated.