Page 73 - 2022年第53卷第5期

Quantification of rainfall spatial and temporal distribution characteristics on the flood hydro⁃
graph and its application in flood type classification

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ZHENG Yanchen ，LI Jianzhu ，RONG Youtong ，DU Yong ，FENG Ping 1
（1. State Key Laboratory of Hydraulic Engineering Simulation and Safety，Tianjin University，Tianjin 300072，China：
2. School of Geographical Sciences，University of Bristol，Bristol BS8 1SS，UK）
Abstract: Flood hydrograph is an important basis for operation and management of hydro-project. The spa⁃
tio-temporal characteristic of rainfall are generally the main driving factors affecting the flood hydrograph. In
this paper，a set of rainfall spatio-temporal characteristic indexes （RSI） are used to analyze the 68 rainfall
events in two study watersheds. Several combination scenarios are designed to study the influence of differ⁃
ent rainfall spatio-temporal characteristics on hydrograph. K-medoids algorithm is used to classify the flood
types with RSI as the input. The results show that the employed RSI could capture the spatio-temporal rain⁃
fall characteristics for study watersheds，facilitating a feasible quantitative method for rainfall characteristics
analysis. The characteristics of three typical flood types from two study watersheds identified by K-medoids
are representative. The research exhibits the potential of applying the RSI to the classification of flood types
and provides a reference for analyzing the driving factors of watershed flood process.
Keywords: Rainfall spatial and temporal characteristics； rainfall characteristics quantitative index； hydro⁃
graph shape；cluster analysis；flood type classification

（责任编辑：耿庆斋）

（上接第559页）

Research progress on ice flood disasters risk assessment and prevention and control
of the river channel-dike-flood plain in cold region

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TIAN Fuchang ，YUAN Ximin 1，2 ，HE Lixin ，WANG Xiujie ，WANG Lina ，GUO Libing 5
（1. State Key Laboratory of Hydraulic Engineering Simulation and Safety，Tianjin University，Tianjin 300072，China；2. School of Civil Engi⁃
neering，Tianjin University，Tianjin 300072，China；3. School of Water Conservancy and Hydroelectric power， Hebei University of Engineering，
Handan 075000，China；4. Wisdom Water Branch of North China Municipal Engineering Design & Research Institute co.， LTD.，Tianjin
300074，China；5. Flood and Drought Disaster Prevention Center of Ningxia Hui Autonomous Region，Yinchuan 750002，China）
Abstract：The gestation，occurrence and evolution of ice flood disasters in cold regions are closely related to
the river channel-dike-flood plain system （RDFS），and the scientific assessment and prevention and control
of ice flood disasters risk are of great importance. The "identification - calculation - assessment - prevention
and control" of ice flood disasters risk was taken as the main line of thinking in this paper. The research prog⁃
ress from the following five aspects：causes and characteristics of ice flood disasters，numerical models of riv⁃
er ice and ice flood，river ice flood disasters risk assessment，risk assessment of dyke failure and inundation
during ice flood，and risk prevention and control measures of ice flood disasters were reviewed. The driving
mechanism and chain effect of ice flood disasters in RDFS，disaster model of river ice evolution - ice flood
backwater - dyke danger - ice flood inundation，risk quantitative assessment of ice backwater-dike burst-ice
flood inundation，dyke freezing and thawing danger evolution mechanism and intelligent prediction，support
system of ice flood disasters including monitoring-early warning-assessment-risk prevention and control，the
digital twin platform for "four presets" of ice flood disasters，were key directions，which can provide important
ideas for in-depth exploration and scientific management of the ice flood disasters risk in cold regions.
Keywords：river channel-dike-flood plain system；ice flood disaster；risk assessment；risk prevention and
control；chain effect

（责任编辑：耿庆斋）

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