Hydrological Processes is an international journal devoted to the publication of original scientific and technical papers in hydrology. The objective of these communications is to improve our understanding of hydrological processes. The scope of the journal encompasses disciplines focussing on the physical biogeochemical mathematical and methodological aspects of hydrological processes together with research on instrumentation and techniques. The journal also publishes several issues annually which relate to themes emergent from conferences hydrological science societies and key research topics identified by editorial board members. HP welcomes the submission of comment/reply on previously published papers. Such submissions should preferably be in the form of a short paper not exceeding 2000 words and relate to papers previously published in HP. All papers for HP should be prepared in accordance with the notes for contributors (http:// www.interscience.wiley.com/jpages/0885-6087/authors.html). Submit papers to the Editor-in-chief of HP or one of the two Associate Editors HPToday is devoted to research and sources of information which are considered to be deserving of rapid dissemination to hydrologists. As such it should be seen as a forum for rapid scientific communication and as a vehicle for up-to-date dialogues in hydrological sciences. HPToday includes invited commentaries letters to the editor refereed scientific briefings current awareness book reviews listing and reviews of internet sites software conference listings and industry updates. Submission information can be found in the HPToday section.