The HESS editorial board, the European Geosciences Union, and Copernicus Publications thank the following colleagues very much for their work in reviewing the manuscripts published in the journal volume 13, 2009.
- Robert J. Abrahart
- Gab Abramowitz
- Russell Adams
- Tim Allott
- Dag Olav Andersen
- Stephen Anderson
- Muhammad Ashraf
- Andrew Baird
- Piotr Banaszuk
- jennie barron
- Luca Belelli Marchesini
- Keith Beven
- Theresa Blume
- Günter Blöschl
- Patrick Bogaart
- Konrad Bogner
- Emmanuel Boss
- Johan Bouma
- Doug Burns
- Tim Burt
- Ximing Cai
- Jean-Christophe Calvet
- Sean Carey
- Markus Casper
- Victor Castillo
- Xi Chen
- Giovanni Battista Chirico
- Robin Thomas Clarke
- Hannah Cloke
- Murray Close
- Antonio Coppola
- Isabelle Cousin
- John Crawford
- Wade Crow
- Chris Curtis
- Guido d'Urso
- Cecile Dages
- Yongjiu Dai
- Gerrit H. de Rooij
- Paul Dirmeyer
- Faruk Djodjic
- Francina Dominguez
- Ishai Dror
- Petra Döll
- Dave D’Amore
- Christopher Eastoe
- Elizabeth Ebert
- Uwe Ehret
- Jauad El Kharraz
- Balazs Fekete
- Fabrizio Fenicia
- John Fenton
- Rouhulah Ferdowsian
- Peter Fiener
- Gerald Flerchinger
- Alejandro Flores
- Andy Fourie
- Martyn Futter
- Peter Gay
- Glendon Gee
- Severino Gerardo
- Lebing Gong
- Jennifer Graham
- Ab Grootjans
- Francisco Gutierrez
- Florence Habets
- Mohsin Hafeez
- Stefan Hagemann
- Dorothy Hall
- Naota Hanasaki
- Minxue (Kevin) He
- Yanbo He
- Bin He
- Stephen R. Hinkle
- Eduard Hoehn
- Huang Huaguo
- Yeshewatesfa Hundecha
- Sascha Iden
- Hirohiko Ishikawa
- Dean Jeffries
- Li Jia
- Tomas Johannesson
- Kimble John
- Hamlyn Jones
- Valentina Khan
- Tsuyoshi Kinouchi
- Mike Kirkby
- Robert Kirnbauer
- Thomas Kjeldsen
- Hagen Koch
- Demetris Koutsoyiannis
- Stefan Krause
- Nagesh Kumar
- Matti Kummu
- Stephan Köhler
- Xin Li
- Rudolf Liedl
- Shaomin Liu
- Chen-Wuing Liu
- Steve Lyon
- Weiqiang Ma
- Yaoming Ma
- Michael Maerker
- Sarith Mahanama
- Hodson Makurira
- Mario Lloyd Virgilio Martina
- Patrick Matgen
- Tom Meixner
- Klaas Metselaar
- Philip Micklin
- François MOLLE
- Elena Montosi
- Sacha Mooney
- Erik Mostert
- Eugene Muzylev
- Brent Newman
- Lawrence Nkemdirim
- Maria Nobles
- Anne Nolin
- Hedi Oberhänsli
- Carlos Ocampo
- Natascha Oppelt
- Stefano Orlandini
- Wilfred Otten
- Ludovic Oudin
- Mohamed Ouessar
- Héctor Osvaldo Panarello
- Gennady Panin
- Juraj Parajka
- Valentijn Pauwels
- Geoff Pegram
- Luis Pereira
- Natasha Pollen-Bankhead
- Kharis Erasta Reza Pramana
- Eckart Priesack
- Shao Quanxi Shao
- Craig Rasmussen
- Alison D. Reeves
- Jens Christian Refsgaard
- Dominik E. Reusser
- Ron Rinehart
- Dan Rosbjerg
- David Rosenberg
- Emmanuel Roulin
- Alain Royer
- Shibao S.B.Dai
- Maarten W. Saaltink
- Hirotaka Saito
- Luis Samaniego
- John Schaake
- Ulrike Scherer
- Massimiliano Schwarz
- Jan Seibert
- Francesco Serinaldi
- Fang Shen
- Murugesu Sivapalan
- johan six
- Jon Olav Skøien
- Christopher Spence
- Mojca Sraj
- Michael Stewart
- Bob Su
- Larry Swatuk
- Christina Tague
- Uchida Taro
- Bärbel Tiemeyer
- Wim Timmermans
- Ezio Todini
- Elena Toth
- Nguyen Bao Trinh
- Osamu Tsukamoto
- Fiorenzo Ugolini
- Nadia Ursino
- Hiroshi Uyeda
- Albert Valocchi
- Nick van de Giesen
- Bart van den Hurk
- Ruud van der Ent
- Michiel van der Molen
- Christiaan van der Tol
- Jan Vanderborght
- Zoltán Vekerdy
- Wouter Verhoef
- Niko Verhoest
- Willem Vervoort
- Castillo Victor
- Alberto Viglione
- Gabriele Villarini
- Nathalie Voisin
- Wolfgang Wagner
- Todd Walter
- David Weaver
- Jun Wen
- Jochen Wenninger
- Larry West
- Andrew Western
- Howard Wheater
- Elin Widén-Nilsson
- Louise Wipfler
- G. Wyseure
- Dawen YANG
- Barbara Zeiner
- Xiwu Zhan
- Xuesong Zhang
- Yinsuo Zhang