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Author

Li

Bio: Li is an academic researcher. The author has contributed to research in topics: Watershed & Flash flood. The author has an hindex of 2, co-authored 3 publications receiving 18 citations.

Papers
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Changzhi, Li, Hong, Wang, Xiaotao, Cheng, Baozhao, Yuan, Meihong, Ma, Changiun, Liu, Dongya, Sun 
01 Jan 2016
TL;DR: Using hydrological modeling technique with detailed sub-basin delineation and manual for design precipitation-runoff computation, the authors introduces basic concept and methods of analyzing critical rainfall for flash flood early warning.
Abstract: Critical rainfall for flash flood early warning is a converse result of precipitation-runoff process based on warning discharge threshold for a warning station of interest in a watershed; the key aspects of critical rainfall include rainfall amount and rainfall duration. Using hydrological modeling technique with detailed sub-basin delineation and manual for design precipitation-runoff computation, this study introduces basic concept and methods of analyzing critical rainfall for flash flood early warning. Taking South Branch of Censhui watershed in China as an example, typical critical rainfalls for flash flood dynamic early warning were estimated for 3 warning stations located in the watershed. This research illustrates that detailed watershed characteristics in the context of several warning stations can be modeled in-depth by further delineating the watershed into smaller sub-basins to simulate spatial distribution of various basin parameters. It further confirms that time of concentration of a watershed is an important factor to rainfall duration determination, and the antecedent soil moisture condition of a watershed has significant impact on critical rainfall for same rainfall duration.

13 citations

Changzhi, Li, Hong, Wang, Baozhao, Yuan, Dongya, Sun, Changjun, Liu 
01 Jan 2015
TL;DR: Wang et al. as discussed by the authors investigated the effects of various erosion control measures on mountain floods, and a case study was conducted in Censhui River South Branch Watershed using scenario analysis and soil conservation service (SCS) methods.
Abstract: To investigate the effects of various erosion control measures on mountain floods, a case study was conducted in Censhui River South Branch Watershed using scenario analysis and soil conservation service (SCS) methods. A distributed hydrological model was developed, and watershed parameters were determined based on satellite imagery, digital terrain models, digital maps and field investigations. Two types of erosion control measures were investigated: the variation of vegetation covers and the change of cultivation techniques. Seven scenarios were considered for the test watershed. The results show: (1) while the de-vegetation results in the increase of peak discharge, the improve of vegetation covers decreases peak discharge at watershed scale; (2) by both improving vegetation cover and enhancing terrace-cultivation technology, the peak discharge is reduced and the peak flow arrival time is delayed; (3) attention should be attached to both early warning system and measures changing the underlying surface and conveyance systems.

3 citations

Changzhi, Li, Baozhao, Yuan, Miao, Zhang, Changjun, Liu, Dongya, Sun 
01 Jan 2015
TL;DR: Using hydrological modeling technique with detailed sub-basin delineation and manual for design rainstorm-runoff computation, the authors first introduced basic concept and analysis methods on critical rainfall for flash flood early warning, then, investigated the responses of flash flood warning critical rainfall to storm pattern.
Abstract: Critical rainfall estimation for early warning of rainstorm-induced flash flood is an inverse rainstorm-runoff process based on warning discharge threshold for a warning station of interest in a watershed. The key aspects of critical rainfall include rainfall amount and rainfall duration. Storm pattern affects highly the estimation of critical rainfall. Using hydrological modeling technique with detailed sub-basin delineation and manual for design rainstorm-runoff computation, this study first introduced basic concept and analysis methods on critical rainfall for flash flood early warning, then, investigated the responses of flash flood warning critical rainfall to storm pattern. Taking south branch of Censhui watershed in China as an example, critical rainfall in case of typical storm patterns for early warning of rainstorm-induced flash flood were estimated at 3 warning stations. This research illustrates that storm pattern plays important role in the estimation of critical rainfall and enough attention should also be paid to storm pattern when making a decision on whether a warning to be issued or not.

2 citations


Cited by
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Journal ArticleDOI
TL;DR: It is argued that with the aid of new information gathering and computational tools, hydrology will witness greater integration with both technical and non-technical areas and increasing applications of information technology tools.
Abstract: Briefly tracing the history of hydrologic modeling, this paper discusses the progress that has been achieved in hydrologic modeling since the advent of computer and what the future may have in store for hydrologic modeling. Hydrologic progress can be described through the developments in data collection and processing, concepts and theories, integration with allied sciences, computational and analysis tools, and models and model results. It is argued that with the aid of new information gathering and computational tools, hydrology will witness greater integration with both technical and non-technical areas and increasing applications of information technology tools. Furthermore, hydrology will play an increasingly important role in meeting grand challenges of the twenty-first century, such as food security, water security, energy security, health security, ecosystem security, and sustainable development.

97 citations

Journal ArticleDOI
TL;DR: In this paper, the erodibility of fluidized cohesive sediments from the seabed of Hangzhou Bay, China, was experimentally investigated in unidirectional open flows.

30 citations

Journal ArticleDOI
Bo Chen1, Chongshi Gu1, Tengfei Bao1, Bangbin Wu1, Huaizhi Su1 
TL;DR: In this article, an energy evolution of arch dams in the failure process is studied first, which can be decomposed as energy dissipation accompanied by concrete damage and elastic strain energy absorption and release during elastic deformation.

27 citations

Journal ArticleDOI
TL;DR: In this article, the dynamics of soil water and solutes were analyzed in a vadose zone (0-15m) under irrigated cropland in the piedmont region of the North China Plain, where soil water content, matric potential and solute concentrations were measured.
Abstract: Understanding the dynamics and mechanisms of soil water movement and solute transport is essential for accurately estimating recharge rates and evaluating the impacts of agricultural activities on groundwater resources. In a thick vadose zone (0-15 m) under irrigated cropland in the piedmont region of the North China Plain, soil water content, matric potential and solute concentrations were measured. Based on these data, the dynamics of soil water and solutes were analysed to investigate the mechanisms of soil water and solute transport. The study showed that the 0-15 m vadose zone can be divided into three layers: an infiltration and evaporation layer (0-2 m), an unsteady infiltration layer (2-6 m) and a quasi-steady infiltration layer (6-15 m). The chloride, nitrate and sulphate concentrations all showed greater variations in the upper soil layer (0-1 m) compared to values in the deep vadose zone (below 2 m). The average concentrations of these three anions in the deep vadose zone varied insignificantly with depth and approached values of 125, 242 and 116 mg/L. The accumulated chloride, sulphate and nitrate was 2179 ± 113, 1760 ± 383 and 4074 ± 421 kg/ha, respectively. The soil water potential and solute concentrations indicated that uniform flow and preferential flow both occurred in the deep vadose zone, and uniform flow was the dominant mechanism of soil water movement in this study. The piston-like flow velocity of solute transport was 1.14 m/yr, and the average value of calculated leached nitrate nitrogen was 107 kg/ha∙yr below the root zone. The results can be used to better understand recharge processes and improve groundwater resources management. This article is protected by copyright. All rights reserved.

23 citations

Journal Article
TL;DR: Basin scale hydrologic model is a good means to study the rainfall runoff relation Remote sensing based hydrologics model is one of main developing directions of basin scale model in the future, and it has a good developing prospect.

20 citations