Investigation and Assessment of the Influence of Cascaded Hydropower Plants on Fish Resources in the Qiuxiangjiang River by LIU Jie, CHEN Lan, CUI Ke, ZHANG Lijuan, LIU Xieting, LI Xin, HU Guocheng

“…The development of cascaded hydropower plants in middle and small rivers has a significant impact on fish resources,mainly includes the destruction of fish habitat.The Qiuxiangjiang River belongs to the first-class tributary of the Dongjiang River in Guangdong Province.This paper evaluates the present situation of fish resources in the Qiuxiangjiang River by aquatic ecosystem investigation and sampling analysis,and compares it with historical data.The results show that due to cascade hydropower development and other human activities in the Qiuxiangjiang River Basin,the suitable habitat for fish decreases.The species and numbers of fish decrease sharply compared with historical records.The fish population structure is relatively unstable,and the fish diversity also gradually reduces.Therefore,for the cascade hydropower development in middle and small rivers,attention should be paid to overall planning the entire river basin,protecting the integrity of the river's aquatic ecosystem,and strictly requiring hydropower plants to build discharge facilities and strengthen supervision of their operation.…”
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Non-native golden dorado, Salminus brasiliensis (Characiformes: Bryconidae): A threat to biodiversity in the Preguiças River, Northeastern Brazil by Jamerson Aguiar-Santos, Mairton Batista Meneses

“…Our study reports the first record of the non-native fish golden dorado, Salminus brasiliensis, for the Preguiças River Basin, Maranhão State, Northeastern Brazil, near the Parque Nacional dos Lençóis Maranhenses (PNLM). …”
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Infraestrutura de mobilidade urbana e sua articulação com a drenagem sustentável by Talita Montagna, Rafaela Vieira

“…A total of 218,816.77 m² of structure was quantified for non-motorized mobility in arterial roads, collectors and circulation areas in parks of the lower section of the river basin, consisting mainly of cementitious base materials. …”
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Discussion on the Application of Water Environment Treatment and Three-water Separation Project in Shenzhen by TANG Yawen, CHEN Wangwang

“…To fulfill the overall requirement of long-term cleanliness and sustainable development of the water environment in Shenzhen,this paper investigates the Longgang River Basin Water Environment Management Project to propose a general three-water separation plan that integrates “closed sewage system,open rainwater system,and efficient interception system”.Tracing to the source and diversion of key outlets and sewage interception transformation are carried out to release the clean base flow,drive the sewage system to be relatively independent from the initial light rain system,and ultimately to slow down non-point source pollution,improve the quality and efficiency of the sewage treatment plant,and strengthen the operation and maintenance scheduling of the pipe network system.With the implementation of the three-water separation project,the influent biochemical oxygen demand (BOD) concentration of the sewage treatment plant in the Longgang River Basin is significantly lower than that in 2019 after the second half of 2020.Therefore,applying the three-water separation project to water environment treatment is essential for fulfilling the assessment requirements on water control and quality improvement in Shenzhen and accomplishing relevant construction tasks.…”
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Delineation of groundwater recharge zones in lateritic terrains using geospatial techniques by A. Ajayakumar, Rajesh Reghunath

“…Abstract This study attempts to narrow down the groundwater potential zones in a river basin where laterites form the major aquifer rock. …”
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Study of Shear Capacity of Jointed Rock Mass with Prestressed Anchor Bolt by Yufei Zhao, Hongtao Zhang, Yong Nie

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Environmental impacts of crop production systems in subtropical plateau regions: case study of Yunnan, China by Yousheng He, Minghao Li, Wei Zhang, Xinping Chen, Zhengxiong Zhao, Zhi Yao

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Flash flood simulation based on distributed hydrological model in future scenarios by Qi Liu, Nan Zhang, Lingling Wang, Kunxia Yu, Jiayi Wu, Jingqi Wang, Meihong Ma, Meihong Ma

“…Therefore, this study focuses on the Daxi River Basin in Guangdong Province. First, CMIP6 precipitation data is utilized to analyze the future precipitation variations on interannual and monthly scales. …”
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Adjustment of the Yellow River Water Allocation Scheme Based on Unused Water Permits by DAI Xiaoping, ZHANG Xiaohong, WAN Fubing

“…Adjustment of the Yellow River Water Allocation Scheme (“Scheme 1987”) is vital for the water resource management of the Yellow River Basin and is a good example to explore the method of river water allocation adjustment.Most researchers analyzed government adjustment methods while market adjustment methods were not fully discussed.This paper put forward a new water allocation scheme based on unused water permits.In the new scheme,assignable water resources will be calculated by subtracting ecological water needs from changed river runoff.Unused water permits will be canceled and returned to the Yellow River Basin Commission and the canceled water permits will be sold to different provinces by auction.The water allocation ratio of provinces will be calculated by the sum of left permits and bought permits.The canceled water permits of Shaanxi Province,Shanxi Province,Henan Province,and Hebei Province and Tianjin City were calculated to be 662,1 417,154,1 362 million m³ respectively.Cancellation of water permits will have a greater impact on Shanxi Province than other provinces.The loss of these provinces should be compensated with the investment of the central government and the fund of water permit auction.This new water scheme adjustment method can provide a novel idea for river water allocation adjustment.…”
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Hydrological Process Simulation Based on Statistical Simulation and Data Assimilation by YIN Jian, QIU Yuanhong, OU Zhaofan

“…In order to solve the load capacity calculation and performance optimization by modelparameter calibration, this paper realizes comprehensive optimization of hydrological simulationby taking the Shahe River Basin in North China as the research object and combining thedistributed time-variable gain hydrological model, the response surface provided by PSUADEplatform for parameter optimization, and the ensemble Kalman filtering for error correction & dataassimilation. achieves parameter calibration through using the observation of the outlet flow ofthe basin as the verification data, taking the Nash-Sutcliffe efficiency coefficient, waterbalance coefficient and their comprehensive functions as the evaluation targets, applying thestatistical simulation proxy model of the hydrological model generated by response surface method,performing a sensitivity analysis on the model parameters and reducing the value range, andadopting the global optimization method, and effectively correct the simulation of the runoffprocess in the river basin based on the remote sensing evapotranspiration observation, the ensemble Kalman filtering algorithm and the data assimilation of the hydrological model. …”
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Hydrological Method Analysis and Determination of Ecological Flow of Water Conservancy Projects: An Example of Zhangshui Youluokou Reservoir by CHEN Zongyi, HUANG Guoxin, WU Qian

“…If the needs for simplified management of small watersheds are considered, it is recommended to adopt the existing result of 1.52 m³/s from the <italic>Zhangjiang River Basin Comprehensive Planning Revision Report</italic>. …”
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Investigation of atmosphere middle level changes center affecting on dry day of Zab catchment using PCA by nader parvin

“…In this study, the annual rainfall data for selected stations Zab River Basin during the period 2015-1986 were the standard time. …”
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Ecological Reconstruction of Rain-source Rivers after Sewage Interception in Highly Intensive Development Areas — A Case Study of Longgang River in Shenzhen by CHEN Yu, YANG Xiuchun, WANG Cong, XU Shengjun, WANG Jinglin

“…The Longgang River in Shenzhen is a representative of the rain-source rivers in highly intensive open areas.In recent years,Shenzhen has carried out sewage interception reconstruction along the Longgang River Basin.Although the water quality of the basin was improved,the reconstruction of the river's ecosystem has been neglected,resulting in spatially discontinuous transverse and longitudinal sections,damaged biological habitats,and a degraded biological community structure.A technology system for combined ecological river reconstruction is developed to provide technical support for the reconstruction of rain-source rivers featuring natural channel imitation,restoration of aquatic habitats,and ecological construction of riverside landscape corridors.The overall idea and technical framework of ecological reconstruction proposed in this paper can fully support the construction of a comprehensive demonstration zone for the reconstruction of aquatic ecological and healthy habitats in Shenzhen.Specifically,substantial increases are achieved in the species and diversity of aquatic organisms in the Longgang River Basin (an increase of 82.7% in species abundance and one of 46.5% in the diversity index),with intolerant species of benthic animals observed and the number of indigenous fish increased.The research results provide engineering samples for the ecological reconstruction of rain-source rivers in highly intensive development areas.…”
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The role of antecedent conditions in translating precipitation events into extreme floods at the catchment scale and in a large-basin context by M. Staudinger, M. Kauzlaric, A. Mas, G. Evin, B. Hingray, D. Viviroli

“…The analysis is based on 10 000 years of continuous simulations from a hydro-meteorological modelling chain for a large catchment, the Aare River basin, Switzerland. To account for different flood-generating processes, we based our work on simulations with hourly time resolution. …”
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A Refined Terrace Extraction Method Based on a Local Optimization Model Using GF-2 Images by Guobin Kan, Jie Gong, Bao Wang, Xia Li, Jing Shi, Yutao Ma, Wei Wei, Jun Zhang

“…The total area of terraces in the Zuli River Basin was calculated at 2557 ± 117.96 km² using EM with our model methodology; this accounts for approximately 41.74% ± 1.93% of the cultivated land area within the Zuli River Basin. …”
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Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method by CHEN Quanfu, LI Xungui

“…In recent years, significant changes in hydrological and engineering conditions have been observed in the Yujiang River basin, and climate anomalies have increased flood control pressures. …”
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Construction of Comprehensive Hydrological and Meteorological Drought Index Based on Base Flow and Precipitation and Its Application in Weihe River by FAN Jingjing, SUN Xue, ZHOU Bin, LIU Dengfeng, LIU Chun, LIN Shuai, LI Yunyun

“…To respond to the national strategy of ecological protection in the Yellow River Basin ,we make a comprehensive assessment of drought in this basin.According to the meteorological data of 20 meteorological stations in Weihe River from 1960 to 2010 and the hydrological data from Huaxian Hydrological Station,the base flow data are obtained by digital filtering,and a new comprehensive drought index related to basic flow and precipitation,i.e.…”
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O método AHP e a Álgebra de Mapas para determinar a fragilidade ambiental da bacia hidrográfica do Rio Brilhante (Mato Grosso do Sul / Brasil), proposições para a gestão do territó... by Patricia Silva Ferreira, Charlei Aparecido da Silva

“…The results are showing that 48% of Brilhante River Basin has a high environmental fragility level. …”
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Asini Corii Colla (Ejiao) as a health-care food and traditional Chinese medicine: A review of its chemical composition, pharmacological activity, quality control, modern applicatio... by Xiao-jun Yu, Ling-mei Kong, Bin Wang, Chang-qi Zhai, Yong-zhen Lao, Long-jian Zhang, Yan Gao, Bo-Nian Zhao

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La Niña Impacts on Austral Summer Extremely High-Streamflow Events of the Paranaíba River in Brazil by Netrananda Sahu, R.B. Singh, Pankaj Kumar, Roberto Valmir Da Silva, Swadhin K. Behera

“…The extremely high-streamflow events of the Paranaíba River basin are found to be associated with La Niña phenomenon during December–February (DJF). …”
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