Introduction to English Version

Department of International Cooperation, Science and Technology of Ministry of Water Resources, P.R.China has the mandate of managing the formulation and revision of water technology standards in China.

Translation of the specification from Chinese into English was organized by Department of International Cooperation, Science and Technology of Ministry of Water Resources, P.R.China in accordance with due procedures and regulations applicable in the country.

This English version of specification is identical to its Chinese original SL 77—2013 Hydrological Computation Specification for Small Hydropower Stations, which was formulated and revised under the auspices of Department of International Cooperation, Science and Technology of Ministry of Water Resources, P.R.China.

Translation of this specification is undertaken by China Institute of Water Resources and Hydropower Research（IWHR）.

Translation task force includes Deng Xianghan, Qi Ying, Liu Yulong, Wang Jianying, Wang Jianwen, Jiao Xing, Xu Hong, Li Lin, and Liu Xiaohui.

This specification is reviewed by Wang Yicheng, Zhang Zhi, Qiao Shishan, Meng Zhimin, Jin Hai, Gu Liya, Lu Shunguang, Liu Zhiyu, Sun Feng, and Wu Suhua.

Department of International Cooperation, Science and Technology Ministry of Water Resources, P.R.China