作者机构：
[Jiang, Changbo; Ma, Yuan; Jiang, CB; Li, Shanshan; Li, Chuannan] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Peoples R China.;[Li, Shanshan] Hunan City Univ, Coll Civil Engn, Yiyang 413002, Peoples R China.;[Jiang, Changbo; Ma, Yuan; Jiang, CB; Li, Chuannan] Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Peoples R China.
通讯机构：
[Jiang, CB ] C;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Peoples R China.;Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Peoples R China.
关键词：
spatiotemporal trend;hydroclimatic variables;the Dongting Lake basin
摘要：
The Dongting Lake basin, located in the middle Yangtze River region, has long been under the threat of climate change. However, there has been a lack of comprehensive analysis and research on the long-term trends and interactions among hydrometeorological factors within the region. To address this gap, this study collected data from 31 meteorological stations in the region and employed statistical analysis methods, including the non-parametric Mann-Kendall test, Sen's slope test, and cross-wavelet analysis. The results revealed significant increases in temperatures, especially in the spring season, while summer, winter, and annual rainfall also exhibited a significant increase. However, spring and autumn rainfall showed a non-significant decrease, and there was a clear decreasing trend in annual streamflow. Interestingly, evaporation demonstrated a significant increasing trend. The annual average temperature and annual runoff exhibited approximately negative correlations in the 6-10-year resonance period and positive correlations in the 4-6-year resonance period. There are significant positive resonance periods in the relationship between annual precipitation and annual runoff within the range of 0-12 years, indicating that precipitation has a substantial impact and serves as the primary source of runoff. Furthermore, there was a transition between "abundance" and "dry" periods in the annual runoff around 4 a, occurring before and after 1973 and 2005. The change points in annual precipitation and runoff were identified as 1993 and 1983.
期刊：
FRONTIERS IN EARTH SCIENCE,2022年10:928052 ISSN：2296-6463
通讯作者：
Luo, H.;Chin, R.J.
作者机构：
[Liu, Yizhuang; Jiang, Changbo; Deng, Bin; Liu, Pan] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha, Peoples R China.;[Liu, Yizhuang; Jiang, Changbo; Deng, Bin] Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha, Peoples R China.;[Chin, Ren Jie] Univ Tunku Abdul Rahman, Lee Kong Chian Fac Engn & Sci, Dept Civil Engn, Kajang, Selangor, Malaysia.;[Kumar, Pavitra] Univ Liverpool, Dept Geog & Planning, Liverpool, England.;[Xiang, Yifei] Guangxi Minzu Univ, Coll Artificial Intelligence, Nanning, Peoples R China.
通讯机构：
[Chin, R.J.] D;[Luo, H.] H;Hunan Provincial Meteorological Service Center, Hunan Province, China;Department of Civil Engineering, Selangor, Malaysia
通讯机构：
[Changbo Jiang] S;School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, PR China<&wdkj&>Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, PR China
通讯机构：
[Lifen Chen; Changbo Jiang] S;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, China<&wdkj&>School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha, 410114, China
摘要：
In this paper, complex wave interactions with a four-cylinder array is considered, which has clear relevance to supporting columns of certain nearshore/offshore structures and supports so-called near-trapping phenomenon when subjected to water waves of appropriate period and direction. High free surface elevations and wave loading are expected and thus endanger structure safety. A Boussinesq model is established based on the cut-cell technique for dealing with complex geometries with curved surfaces. The model is validated against the experimental measurements for capturing the near-trapping by a four-cylinder structure in a square arrangement, and is extended to investigate the near-trapping for various scenarios. It is found that the wave periods at which the near-trapping occurs increase with the center-to-center spacings between two adjacent cylinders. Moreover, the re-reflection modes that the waves inside the cylinder array are reflected back and forth among neighboring cylinder pairs can be clearly seen from the flow field streamlines. The energy is trapped inside the array and decays slowly due to wave radiation. This trapped wave would eventually meet with the subsequent incident wave crest, leading to high free surface elevations at near-trapping periods. In view of this, two scenarios are designed to avoid/minimize the near-trapping by breaking the geometry symmetry, hence, the re-reflections modes.
作者机构：
[Jiang, Changbo; Liu, Jiang; Xiong, Kai; Deng, Bin; Luo, Wei; Huang, Zhiyong] Changsha Univ Sci & Technol, Sch Hydraul & Environm Engn, Changsha 410114, Peoples R China.;[Jiang, Changbo; Deng, Bin; Huang, Zhiyong] Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Peoples R China.;[Jiang, Changbo; Deng, Bin; Huang, Zhiyong] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Peoples R China.;[Xiang, Yifei] Guangxi Minzu Univ, Coll Artificial Intelligence, Nanning 530006, Peoples R China.
通讯机构：
[Zhiyong Huang] K;Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China<&wdkj&>School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
water-body indices;lightweight neural network;river-channel morphology;accretion and erosion area;the Tongtian River
通讯机构：
[Changbo Jiang] S;School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
GPM constellation satellites;IMERG V06;the Dongting Lake basin;satellite precipitation estimates;precision
摘要：
Precipitation data from ground-based observatories in the Dongting Lake basin are often missing, resulting in large errors in surface precipitation data obtained by interpolation, which affects the accuracy of hydro-meteorological studies. Integrated Multisatellite Retrievals for Global Precipitation Measurement (IMERG) is the main high-resolution precipitation product, which is available to supplement measured missing data. To evaluate the applicability of this product in the Dongting Lake basin at multiple spatial and temporal scales, this paper analyzes daily, monthly, seasonal, annual, and extreme precipitation events of the three latest IMERG precipitation products (IPPs) (IMERG-F, IMERG-E, and IMERG-L) using eight statistical evaluation metrics. We find that the spatial and temporal performance of IMERG precipitation products varies over different time scales and topographic conditions. However, all three metrics (CC, RMSE, and RB) of the IMERG-F precipitation products outperform the IMERG-E and IMERG-L precipitation products for the same period. In the comparison of IMERG and TRMM (Tropical Rainfall Measuring Mission) precipitation products on monthly and seasonal scales, IMERG-F performed the best. IPPs can capture precipitation more accurately on seasonal scales and perform better in winter, indicating good detection of trace precipitation. Both high and low altitudes are not favorable for the satellite detection of extreme precipitation in both general and extreme precipitation events. Overall, the accuracy of IMERG-F with correction delay is slightly better than that of IMERG-E and IMERG-L without correction under near-real-time conditions, which is applicable in the Dongting Lake basin. However, the correction process also exacerbates overestimation of the precipitation extent.
期刊：
Ecotoxicology and Environmental Safety,2022年243:113958 ISSN：0147-6513
通讯作者：
Changbo Jiang
作者机构：
[Yin, Lingshi; Long, Yuannan; Zhang, You; Jiang, Changbo; Zhou, Zhenyu; Wu, Zhiyuan; Kang, Ziyi; Wen, Xiaofeng; Sun, Qiaoling; Nie, Xiaobao] Changsha Univ Sci & Technol, Sch Hydraul & Environm Engn, Changsha 410114, Peoples R China.;[Yin, Lingshi; Long, Yuannan; Jiang, Changbo; Wu, Zhiyuan; Wen, Xiaofeng; Nie, Xiaobao] Key Lab Dongting Lake Aquat Eco Environm Control &, Changsha 410114, Peoples R China.;[Yin, Lingshi; Long, Yuannan; Jiang, Changbo; Wu, Zhiyuan; Wen, Xiaofeng; Nie, Xiaobao] Key Lab Water Sediment Sci & Water Disaster Preven, Changsha 410114, Peoples R China.
通讯机构：
[Changbo Jiang] S;School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China<&wdkj&>Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China
作者机构：
[蒋昌波; 徐进; 屈科] School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha;410114, China;Key Laboratory of Water Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha;Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha;[蒋昌波; 屈科] 410114, China<&wdkj&>Key Laboratory of Water Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha
通讯机构：
[Qu, K.] S;School of Hydraulic Engineering, China
