Climate change has altered hydrologic conditions, which directly affects water resources. In addition, increasing human activities have an impact on water resources, water environment and water ecology. Rivers are important channels of water cycle, the main source of fresh water for human consumption and an important renewed resource, which play essential roles in material cycle, energy flow and climate regulation. Reservoirs are important components of water conservancy constructions, and play vital roles in regional flood interception, water storage, and the regulation of water flow. It is of great significance to study the mechanism of the water cycle under the changing environment and build an optimized water resource management based on it.

Rivers and reservoirs are faced with many problems, and it is necessary to study the optimal management of water resources in rivers, lakes and reservoirs, the hydrological mechanism and ecological environment process (including experimental and numerical simulation methods), the optimal operation of engineering facilities and their natural and social effects, as well as the mitigation of water security problems and ensuring the sustainability of the ecosystem through the integrated management of rivers and reservoirs.

In Focus – a book series that showcases the latest accomplishments in water research. Each book focuses on a specialist area with papers from top experts in the field. It aims to be a vehicle for in-depth understanding and inspire further conversations in the sector.

Editorial: Integrated management of rivers and reservoirs
Weiwei Shao, Quan Jin

A study on the phytoplankton community structure in the Diaohe River section of the Middle Route of the South-to-North Water Diversion Project in winter
Yi Xu, Jiankui Liang, Junqiang Lin, Xiaohui Lei, Gongbo Ding and Ruifang Yuan

Water quality index and spatio-temporal perspective of a large Brazilian water reservoir
Karla Lorrane de Oliveira, Ramatisa Ladeia Ramos, Sílvia Corrêa Oliveira and Cristiano Christofaro

Construction and application research of ecological evaluation platform based on Cesium
Yao Fu, Guize Luan, Jingzhi Cai, Yuchen Li and Fei Zhao

Simulation of nitrogen and phosphorus pollution in typical agricultural and forested basins as well as relevant reduction effect based on SWAT model
Wu Li, Chen Zhe, Liu Hui-ying and Wang Dun-qiu

Water quality assessment of Middle Route of South-North Water Diversion Project based on modified Nemerow index method
Yilin Yang, Dawei Zhang, Jin Quan, Pengwen Wang and Yi Xu

Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system
Zijun Dong, Mu Li, Meifen Chen, Yurong Gu, Chengchun Jiang and Feiyun Sun

Impacts of precipitation and topographic conditions on the model simulation in the north of China
Long Sun, Zhijia Li, Ke Zhang and Tingting Jiang

Evaluation of water security based on capacity for socio-economic regulation
Lian Tang, Weibing Zhang, Zixi Liu and Yarong Qi

Research on ecological environment impact assessment based on PSR and cloud theory in Dari county, source of the Yellow River
Wang Yongqiang, Wu Zhijun, Yan Bo, Li Kai and Huang Feng

Simulation effect evaluation of single-outlet and multi-outlet calibration of Soil and Water Assessment Tool model driven by Climate Forecast System Reanalysis data and ground-based meteorological station data–a case study in a Yellow River source
Kai Li, Yongqiang Wang, Xiaodong Li, Zhe Yuan and Jijun Xu

Research on water resources dispatch model based on improved genetic algorithm–water resources dispatch model
Haoran Fu and Huahui Li

Monitoring of pollution factors of solidified body leachate in a drilling well site and its influence on the surface water environment
Zhikun Liu, Chaoqun Zhang and Qi Li

Virtual water and its effect in Huaihe River basin: an analysis using a dynamic multi-region computable general equilibrium model
Jing Zhao, Jinhua Liu, Hongzhen Ni, Yong Zhao, Yuping Han and Zicheng Diao

Numerical simulation of three-dimensional hydrodynamic characteristics and pollutant diffusion behavior by ROMS model
Jing Ren, Chazhong Ge, Chunxu Hao, Rui Hu, Kefu Cui, Chen Peng, Quan Zhou, Aiyu Yu, He Xu, Shiqing Liu and Feng Li

An analysis on the influence of precipitation infiltration on groundwater under different irrigation conditions in the semi-arid area
Long Yan, Min-jian Chen, Peng Hu, Di-li Li and Yong Wang

Calculation of drainage volume during tunnel construction based on the control of negative effects of ecosystem
Yu Wang, Yan Zhao, Xiaoyan Ge, Yongyu Li, Tianrong Huang and Qingming Zhang

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