he high scientific standards maintained by Hydrology Research in its papers owe much to the continuing dedication of the journal's reviewers, who give freely of their time and expertise. IWA is pleased to pay tribute to this contribution by recognizing those who have participated in the review process. Thus, the Editors of Hydrology Researchacknowledge with particular gratitude the following reviewers who have reviewed papers during the period January 2017–December 2017.
| Mahyar Aboutalebi | Graziella Devoli | Trupti Kamble | Jun Niu | Gokmen Tayfur |
| Sajal Adhikary | Mariaines Didato | Suchul Kang | Umut Okkan | Hein ten Berge |
| Arash Adib | Lawrence Dingman | Anil Kar | Ludovic Oudin | Praveen K Thakur |
| Bodo Ahrens | Harry Dixon | Sarat Kar | Ricardo Oyarzún | Dimitris Tigkas |
| Laura Alakukku | Michal Dohnal | Sepideh Karimi | Ilhan Özgen | Massimo Tomirotti |
| Abdulrahman A. Alazba | Jinkang Du | Konstantinos Katsifarakis | Rebecca Page | Ali Torabi Haghighi |
| Abdelziz Al-Bassam | Xinzhong Du | Michal Wojciech Kawecki | Chengzhong Pan | Slavisa Trajkovic |
| Knut Alfredsen | Doris Düthmann | Melvyn Kay | Yun Pan | Paolo Trivero |
| Ahmed Ali | Asong Elvis | Ali Keshavarzi | Juraj Parajka | Magdalena Urbaniak |
| Mohd Yawar Ali Khan | Steven Emery | Deepak Khare | Amir Paster | Mehdi Vafakhah |
| Talei Amin | Ebru Eris | Giora Kidron | Maryam Pazoki | Anne Van Loon |
| Gholamreza Andalib | Gilles Essou | Kue Bum Kim | Ilias Pechlivanidis | Floris van Ogtrop |
| Heiko Apel | Sarah Evans | Sungwon Kim | Daniele Penna | D.J. Vicente |
| David Archer | Grey Evenson | Ozgur Kisi | Donizete Pereira | Alberto Viglione |
| Richard Arsenault | Marcus Fahle | Vasileios Kitsikoudis | Muthiah Perumal | Elena Volpi |
| Parisa-Sadat Ashofteh | Giulia Farina | Michael Kizza | Matthias Pfannerstill | Paul Wagner |
| Miriam Athmann | Boris Faybishenko | Thomas Kjeldsen | Soni Pradhanang | Dagang Wang |
| Olgu Aydin | Irina Fedorova | Bjørn Kløve | Ilaria Prosdocimi | Dong Wang |
| Muhammad Azmat | James Feiccabrino | James Knighton | Carlos Prosperi | Gangsheng Wang |
| Zoubeida Bargaoui | Stefan Felder | Jerry Knox | Antonello Provenzale | Guo-Qing Wang |
| Sishutosh Barua | Ennio Ferrari | Harri Koivusalo | Inmaculada Pulido | Keh-Han Wang |
| M Becker | Guenther Fischer | Medhi Komasi | Huapeng Qin | Xuelei Wang |
| Sypros Beltaos | Eirik Førland | Ryszard Kornijow | Nevil Quinn | Yuankun Wang |
| Lars Bengtsson | Harrie-Jan Franssen | Jurate Kriauciuniene | Elisa Ragno | Zanli Wang |
| Keith Beven | Allan Frei | Valentina Krysanova | Agnieszka Rajwa-Kuligiewicz | Zhaoli Wang |
| Matthew Bilskie | Guangtao Fu | Monika Kukuryk | Nageswara Rao | Bryan Weare |
| Simone Bircher | Guobin Fu | Wolfgang Kurtz | Anssi Rauhala | Paul Webster |
| Andrew Black | Qiang Fu | Andrew La Croix | G.P. Obi Reddy | Wangru Wei |
| matias Bonansea | Martyn Futter | Ainis Lagzdins | Alvina Reihan | Zhongwang Wei |
| Luca Brocca | Francesc Gallart | Chengguang Lai | Riccardo Rigon | Wang Weiguang |
| Michael Bruen | Hongkai Gao | Michel Lang | Jose Roldan Canas | Xiaohu Wen |
| Philip Brunner | Xiaodong Gao | Zaw Zaw Latt | Noori Roohollah | Robert Wenger |
| Steven Buchberger | Diego Garcia de Jalon | Binquan Li | Dan Rosbjerg | Harry West |
| Tom Buijse | Pablo JIménez Gavilán | Chao Li | Pekka Rossi | Ida Westerberg |
| Chongfa Cai | Pantazis Georgiou | Fawen Li | Emmanuel Roulin | Hartmut Wittenberg |
| Matteo Camporese | Bahram Gharabaghi | Lanhi Li | Tirthankar Roy | Cameron Wood |
| Ian Cartwright | Mohammad Ali Ghorbani | Lu Li | Dario Sacco | Xing Wu |
| Markus Casper | Alan Gilmer | Mian Li | Morteza Sadeghi | Zhenxiang Xing |
| Artemi Cerdà | Lebing Gong | Weiyue Li | Bahram Saghafian | Lihua Xiong |
| Chandramouli Chandramouli | Pierre Goovaerts | Yanzhong Li | James Sample | Chong-Yu Xu |
| Fi-John Chang | Salvatore Grimaldi | Zhansong Li | Laura Scherer | Ying Xu |
| Winai Chaowiwat | Mark Grismer | Zhongwu Li | Petra Schmitter | Yueping Xu |
| K.W. Chau | Marie-Christine Gromaire | Carlos Lima | Arelia Schoeneberg | Deng Hua Yan |
| Dingjiang Chen | Giovanna Grossi | Gwo-Fong Lin | Hans Matthias Schoeniger | Hanbo Yang |
| Hongsong Chen | Huade Guan | Kairong Lin | Frank Schwartz | Xiaohui Yang |
| Jie Chen | Joseph Guillaume | Karl-Erich Lindenschmidt | Stephen Sefick | Peiling Yang |
| Juan Chen | Zenonas Gulbinas | Jintao Liu | Jan Seibert | Yonghui Yang |
| Jui-Sheng Chen | Stephan Gunn | Lvbo Liu | Avirup Sengupta | Zhibing Yang |
| Xi Chen | Shenglian Guo | Pan Liu | Quanxi Shao | Cheng Yao |
| Y Chen | Heikki Hämäläinen | Wenbin Liu | Hong Shen | Zaher Yaseen |
| Yaning Chen | Dawei Han | Hugo Loáiciga | Zhenyao Shen | Tien Yee |
| Ying Chen | Jing-Cheng Han | Chengpeng Lu | Zhihua Shi | Tian-Chyi Yeh |
| Lei Cheng | Songjun Han | Jianzhong Lu | Victor Shinde | Haw Yen |
| Ismail Chenini | Tianding Han | Terry Lucke | Jalal Shiri | Abdullah Yilmaz |
| Yen-Ming Chiang | Kupfersberger Hans | Ning Ma | Muhammad Shoaib | Shui-qing Yin |
| Mo-Hsiung Chuang | Carly Hansen | Neil MacDonald | Christian Siebert | Yixing Yin |
| Ian Cluckie | Andreas Hartmann | Hector Macian | Mritunjay Singh | Chulsang Yoo |
| Nadim Copty | Jianxun He | Majid Mahmoodabadi | Raj Singh | Lejiang Yu |
| Giovanni Corato | Robert Heinse | Maysam Majidi | Ylva Sjoberg | Xinxiao Yu |
| Jacqui Cotton | Younggu Her | Nikolaos Malamos | Louise Slater | Haijun Yu |
| Matthew Cracknell | Glenn Hodgkins | Marco Mancini | Sarah Sojka | Pao-Chiang Yuan |
| Barry Croke | Michael Horswell | Lili Mao | Shima Soleimani | Omer Yuksek |
| Christophe Cudennec | Wei Hu | Pau Martí | Abel Solera-Solera | Baoqing Zhang |
| Buli Cui | Zengyun Hu | Arthur McGarity | Mohammad Solgi | Chi Zhang |
| Huijuan Cui | Wenxin Huai | Luis Mediero | Xianfang Song | Dan Zhang |
| Matthew Currell | Shaochun Huang | Chiyuan Miao | Xinyi Song | Guanghui Zhang |
| Alli Danandeh Mehr | Shengzhi Huang | Liu Miao | Alvaro Sordo-Ward | Ke Zhang |
| Mohammad Danesh-Yazdi | Zhiyong Huang | Steven Mitchell | Chris Spence | Lei Zhou |
| Amlan Das | Jin Huijun | Kehinde Mogaji | Abe Springer | Qi Zhang |
| Lalu Das | Jari Hyvaluoma | Piotr Moniewski | James Stagge | Shanghong Zhang |
| Warrick Dawes | Teloglou Ilias | Donal Mullan | Elizabeth Stewart | Wanchang Zhang |
| Gustavo de Almeida | Leland Jackson | Marc Muller | Veronika Stolbova | Yafeng Zhang |
| Sandra De Iaco | Lillian Jeznach | Mohammad Najafzadeh | Fubao Sun | Yinsheng Zhang |
| Michael DeGrandpre | Haifeng Jia | Umamahesh Nanduri | Yabin Sun | Yu Zhang |
| Giuseppe Del Giudice | Fiona Johnson | Jeff Neal | Jozsef Szilagyi | Yueguan Zhang |
| Mehmet C Demirel | Matthew Johnson | Ram Neupane | Hossein Tabari | Zengxin Zhang |
| Peng Deng | James Jordan | Cosmo Ngongondo | Adnan Tahir |