Volume 1 of the study on Hydro-Institutional Mapping of the Olifants River Basin. This study aims to give an overview of water users and influences on water use by institutions in the Steelpoort river basin, a sub-basin of the Olifants. Describes a general methodology and framework for setting out the HIM for a river basin and presents findings from case studies in the basin. The hydro-institutional interactions among all types of water users in a South African river basin are also described.

Changes in the way water is used in one part of a river basin often affect how water is used somewhere else in that basin. This report introduces the concept of hydronomic ( hydro water + nomus management) zones that were developed to help untangle some of the complexities of basin-wide water resource use.

Proceedings of a workshop held in Embilipitiya, Sri Lanka, 29th March 2001. Presents preliminary findings on malaria patterns and possible risk factors and describes the progress of IWMI research towards developing a risk map for Sri Lanka. It also contains presentations by Regional Malaria Officers, and other officials involved in malaria control, on areas of high malaria risk within their districts.

This working paper contains the proceedings of the workshop on ?Malaria risk mapping in Sri Lanka?implications for its use in control? that was held on May 25, 2001 at IWMI Headquarters in Colombo, which was a follow up to the workshop conducted on March 29, 2001 in Embilipitiya (Klinkenberg 2001). The workshop in Embilipitiya was organized at the local level to discuss the results of the malaria risk mapping work carried out by IWMI in the Uda Walawe region of Sri Lanka.

Describes the use of a distributed hydrologic model to evaluate different data scenarios. The study attempted to answer questions such as; what will happen to the basin water resources if a)there is a change in climate; b)it is decided that more water must be retained in the river for environmental reasons; c)more water is extracted for urban and industrial use; d)the timing and accounts used for water are changed?

The study is reported in two Working Papers. Working Paper 17 reports the findings of the HIM exercise. This paper contains the policies, legislation and organizations relevant for understanding of the HIM for the Olifants river basin. It also includes the historical development of the institutional framework in the basin, as this history has left a profound imprint on the South African society at large and is still dictating, in many cases, the interactions between the different organizations.