Global hydrological models : a review

Global Hydrological Models (GHMs) have effectively become a separate research field in the last two decades. The paper reviews and compares 12 known global modeling efforts since 1989, the year the first GHM was published. Structure, strengths and weaknesses of individual models are examined, and the objectives of model development and their initial applications are documented. Issues such as model uncertainty, data scarcity, integration with remote sensing data and spatial resolution are discussed.