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The fluvio-deltaic interaction on river channel morphodynamical equilibrium in the lower Yellow River

GEOMORPHOLOGY 2025年 474卷

作者： Wang, Dangwei Ma, Yuanxu Liu, Xiaofang ji, zuwen Deng, Anjun Chen, jianguo Wang, Yuhai China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat Water Cycle River Beijing 100038 Peoples R China Int Res Ctr Big Data Sustainable Dev Goals Beijing 100094 Peoples R China Chinese Acad Sci Aerosp Informat Res Inst Key Lab Digital Earth Sci Beijing 100094 Peoples R China Hainan Aerosp Informat Res Inst Key Lab Earth Observat Hainan Prov Wenchang 571300 Hainan Peoples R China Minist Water Resources China Inst Water Resources & Hydropower Res Key Lab Sediment Sci & Northern River Training Beijing 100038 Peoples R China Beijing Capital Ecoenvironm Protect Grp Co Ltd Beijing 100044 Peoples R China

Upstream river channel adjustments exhibit complex responses to changes in base level, particularly those induced by delta river channel avulsions. While this phenomenon has been studied, the equilibrium of river channels under the influence of base level changes and fluvial transport remains unclear. The Yellow River delta, known for frequent channel avulsions, exerts a time-varying impact on upstream river channel dynamics. In this study, we employed multi-source data to quantify the overall effect of delta evolution on upstream river channel changes in the lower Yellow River. We analyzed water level fluctuations at a discharge of 3000 m3/s (a representative near-bankfull discharge) from five hydrological stations over the period from 1951 to 1990. The water levels at all five cross-sections showed an overall rising trend with fluctuations. However, the trends at different stations during the same period were not synchronous, indicating that the river channel bed elevation did not rise or fall uniformly across the entire lower Yellow River. To explore this further, we conducted lagged linear regression to determine how river channel changes responded to delta propagation both downstream and upstream. The regression results showed no lag in water level changes at the five hydrological stations in the downstream direction. However, in the upstream direction, the water levels at Huayuankou, Gaocun, Aishan, and Luokou demonstrated a maximum delayed response of up to 8 years to changes at the Lijin station. This suggests that river channel adjustments can experience up to an 8-year delay in response to flow-sediment regimes at Lijin, likely due to the backwater effects of deltaic evolution. The point of transition where lagged regression coefficients in both the downstream and upstream directions converge near Aishan was identified as the upper boundary of the delta backwater effect. At this location, the downstream influence of fluvial processes and the upstream influ

关键词： Delta Backwater River channel change Water level Lagged regression Yellow River

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黄河三角洲植被覆盖度与生态需水量研究

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水土保持研究 2025年第4期32卷 168-175,188页

作者：田芸吉祖稳王党伟谢益芹中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100048

[目的]探究黄河三角洲地区湿地生态的时空动态变化以及水量需求,阐明植被覆盖度对生态补水的响应机制,进而为黄河三角洲地区生态保护提供依据。[方法]基于2000—2022年黄河三角洲的土地利用和植被归一化指数(NDVI)数据,通过像元二分法... 详细信息

[目的]探究黄河三角洲地区湿地生态的时空动态变化以及水量需求,阐明植被覆盖度对生态补水的响应机制,进而为黄河三角洲地区生态保护提供依据。[方法]基于2000—2022年黄河三角洲的土地利用和植被归一化指数(NDVI)数据,通过像元二分法计算植被覆盖度,采用slope趋势分析等方法,明确黄河三角洲植被覆盖度的时空变化特征及其对生态补水量的响应,基于功能设定法及面积定额法对黄河三角洲的生态需水量进行估算。[结果](1)黄河三角洲植被改善区域面积和退化区域面积占比分别为63.2%和27.7%,植被覆盖度总体呈现增加趋势;(2)生态补水的实施对于植被覆盖度的增加具有明显的促进作用,生态补水实施以后,植被退化区域的面积占比减小,植被改善区域的面积占比增加;(3)黄河三角洲全年最小、适宜及最大生态需水量分别为2.91亿m³、5.43亿m³和9.11亿m³;自然保护区以外的区域全年最小、适宜和最大生态需水量分别为0.98亿m³、1.82亿m³和3.07亿m³。[结论]生态补水显著提高了黄河三角洲的植被覆盖度,且生态补水量与植被覆盖度正相关,研究结果可以为黄河三角洲的生态修复与水沙配置提供技术支撑。

关键词：植被覆盖度生态需水量植被归一化指数黄河三角洲

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基于平移相关法的黄河口溯源冲淤范围分析

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水科学进展 2021年第2期32卷 242-249页

作者：王党伟吉祖稳邓安军中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100048

河口延伸及流路改道的溯源影响是科学制定黄河下游河道治理与河口治理规划的关键问题之一,关系到治黄战略及策略的确定。基于沿程冲淤和溯源冲淤在时空上的传播特征,提出了平移相关分析方法,采用1950—1990年的水位数据,分析了黄河口流... 详细信息

河口延伸及流路改道的溯源影响是科学制定黄河下游河道治理与河口治理规划的关键问题之一,关系到治黄战略及策略的确定。基于沿程冲淤和溯源冲淤在时空上的传播特征,提出了平移相关分析方法,采用1950—1990年的水位数据,分析了黄河口流路演变对黄河下游河道的溯源影响过程和范围。结果表明:①黄河下游不同断面上的水位总体呈震荡上升趋势,水位变化过程在空间上并不完全同步,相同时间节点上各断面水位存在较大差别,具有扰动波的传播特征;②黄河下游沿程冲淤发展速率较快,冲淤扰动波从花园口传递到高村大约需要1 a,高村与艾山之间的冲淤变化则基本同步;③溯源冲淤发展速度较慢且存在滞后效应,泺口冲淤变化主要受利津前8 a冲淤变化的累积影响;④黄河口流路演变溯源影响主要在艾山以下,距离黄河入海口约350 km以内的河段主要受溯源冲淤影响。

关键词：河口演变溯源影响平移相关分析法黄河口

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A new parallel algorithm to solve one classic water resources optimal allocation problem based on inspired computational model

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DESALINATION AND WATER TREATMENT 2019年第0期160卷 214-218页

作者： ji, zuwen Wang, Zhaocai Deng, Anjun Huang, Wei Wu, Tunhua China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat River Basin Water Beijing 100048 Peoples R China Shanghai Ocean Univ Coll Informat Shanghai 201306 Peoples R China Guiyang Univ Coll Math & Informat Sci Guiyang Guizhou Peoples R China Wenzhou Med Univ Affiliated Hosp 1 Wenzhou 325035 Peoples R China

The shortage of freshwater resources is a serious problem in the process of urbanization in the world, and even become the main constraint factor in some areas. In order to solve the problem, it is imperative to develop an effective, flexible and low-cost water resources management plan. Water resources optimal allocation is one of the hot topics in the field of water resources at present, such as water resources optimal k-edge cover problem. The k-edge cover problem aims to find an edge cover set with k edges in a given undirected graph. The efficient solution of this problem can play an important role in planning and setting up urban water resources network sites. Based on DNA molecular computing, the paper use a new parallel algorithm to solve k-edge cover problem with O(n(2)) time complexity, which greatly simplifies the computing complexity.

关键词： DNA computation Water resources optimal allocation problem The k-edge cover problem Adleman-Lipton model NP-complete problem

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Study on Fluvial Processes and Sediment Transport Capacity of Teesta River in Bangladesh 19

Study on Fluvial Processes and Sediment Transport Capacity o...

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World Environmental and Water Resources Congress / 19th Annual Congress of the Environmental-and-Water-Resources-Institute (EWRI) / EWRI History and Heritage Symposium

作者： Shi, Hongling ji, zuwen Lu, Qin Wang, Dangwei China Inst Water Resources & Hydropower Res POB 366 Beijing 100048 Peoples R China State Key Lab Simulat & Regulat Water Cycle River POB 366 Beijing 100048 Peoples R China

ISBN: (数字)9780784482353

ISBN: (纸本)9780784482353

As a tributary of Brahmaputra-Jamuna (hereinafter referred to as "Jamuna") River, Teesta River joins into the trunk river at Rangpur in north-west of Bangladesh, and has been developed to be a significant irrigation system in this area. While due to insufficient observed sediment load sequences of Teesta River, neither the characteristics of siltation and erosion of the river bed nor the regularity of sediment transport are clarified. Based on analyses river bed form changes with runoff variations, it illustrate that the channel of Teesta River are wide and shallow with many gullies, and the main course shifts frequently with obvious aggradations and shrink in the latest years. Furthermore, the 1-D non-equilibrium non-uniformity sediment transport mathematical model is applied to probe and make clear the Teesta River evolution. The result shown that, the sediment transport capacity is following the classical equation of Q(s)=kQ(alpha), with different k and alpha in different flow grade;the mean annual sediment load is around 31.4 million t, corresponding to the mean annual runoff of 25.2 billion m(3). The study would supply the significance for guiding Teesta River sustainable development.

关键词： Rivers

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Branch Channel Evolution and Its Effects on Tail Channel in the Yellow River Estuary 19

Branch Channel Evolution and Its Effects on Tail Channel in ...

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World Environmental and Water Resources Congress / 19th Annual Congress of the Environmental-and-Water-Resources-Institute (EWRI) / EWRI History and Heritage Symposium

作者： ji, zuwen Shi, Hongling Xiang, Zhao Lu, Qin China Inst Hydropower & Water Resources Res State Key Lab Simulat & Regulat Water Cycle River Beijing 100038 Peoples R China China Inst Hydropower & Water Resources Res Beijing 100038 Peoples R China

ISBN: (数字)9780784482353

ISBN: (纸本)9780784482353

The Yellow River estuary is characterized by the accumulation of weak tidal and multi-sediment, frequent swinging, and rapid land-making. With the development of regional economy, it is important to ensure the basic stability and prolong the current Qingshuigou Channel in the Yellow River estuary. In addition, there are frequent swinging river channels in the mouth reaches below Cha-2, which can transfer the runoff sand to both sides of the mouth and delay the extension of the sand mouth, which is more beneficial to the stable flow path. Based on the measured data of remote sensing satellite, runoff sediment, and ocean dynamic process in the Yellow River estuary, this paper analyzes the evolution characteristics of the water channel in the mouth reach, and reveals the influencing factors and the dynamic process of the different type channels. The dynamic conditions of different type channels and their effects on the water level and the change of scour and deposition in the Yellow River's tail river are expounded. After entering the middle in the Qingshuigou flow road, the water branches widely distributed on the area of mouth reach. The diversion of these branches is advantageous to the Yellow River sediment distribution to the two sides of the sand mouth, and can prevent the rapid siltation of the sand mouth. But these branches are not conducive to the concentration of water flow flushing the main channel. Especially in the case of water and sand unfavorable, the channel may produce siltation and blockage, resulting of the river level elevation and the flood disaster in the tail channel of the Yellow River estuary. Therefore, to carry out the diversion of water channels is suitable based on the evolution characteristics of main and branch channels in the Yellow River estuary.

关键词： Water levels

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Research on water resources optimal scheduling problem based on parallel biological computing

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DESALINATION AND WATER TREATMENT 2018年 111卷 88-93页

作者： ji, zuwen Wang, Zhaocai Bao, Xiaoguang Wang, Xiaoming Wu, Tunhua Inst Water Resources & Hydro Power Res State Key Lab Simulat & Regulat River Basin Water Beijing 100048 Peoples R China Shanghai Ocean Univ Coll Informat Shanghai 201306 Peoples R China Wenzhou Med Univ Sch Informat & Engn Wenzhou 325035 Peoples R China

Water resource shortage has become one of the main factors restricting the rapid economic and social development of mankind, how limited water resources reasonable allocation to various users, protection of life and production, ecological water safety is facing an important problem in various countries. Water resources optimal scheduling problem also has a wide range of application space, which involves cost control and optimization of design expertise. The shortest flow path problem, as a well-known NP-complete problem and one of famous water resources optimal scheduling problem, has attracted the attention of many scholars. In this paper, we use a new parallel algorithm to solve the problem by basic DNA molecular operations. We reasonably design DNA chains that characterize cities and paths, take appropriate biological operations and get solutions of the task scheduling problem in proper length range with O(n(2)) time complexity. The ability of biological manipulation in the algorithm helps us better understand DNA computing, and can be widely used to solve more complex problems.

关键词： DNA computing Water resources optimal scheduling problem The shortest flow path problem NP-complete problem

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A novel bio-heuristic computing algorithm to solve the capacitated vehicle routing problem based on Adleman Lipton model

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BIOSYSTEMS 2019年 184卷 103997-000页

作者： Wang, Zhaocai Ren, Xiaomin ji, zuwen Huang, Wei Wu, Tunhua Shanghai Ocean Univ Coll Informat Shanghai 201306 Peoples R China China Inst Water Resources & Hydropower Res State Key Lab Simulat & Regulat River Basin Water Beijing 100048 Peoples R China Guiyang Univ Coll Math & Informat Sci Guiyang 550005 Guizhou Peoples R China Wenzhou Med Univ Affiliated Hosp 1 Wenzhou 325035 Peoples R China

DNA computing, as one of potential means to solve complicated computational problems, is a new field of interdisciplinary research, including computational mathematics, parallel algorithms, bioinformatics. Capacitated vehicle routing problem is one of famous NP-hard problems, which includes determining the path of a group same vehicles serving a set of clients, while minimizing the total transportation cost. Based on the bioheuristic computing model and DNA molecular manipulations, parallel biocomputing algorithms for solving capacitated vehicle routing problem are proposed in this paper. We appropriately use different biological chains to mean vertices, edges, weights, and adopt appropriate biological operations to search the solutions of the problem with O(n(2)) time complexity. We enrich the application scope of biocomputing, reduce computational complexity, and verify practicability of DNA parallel algorithms through simulations.

关键词： DNA computing Capacitated vehicle routing problem Adleman-Lipton model NP-hard problem

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Siltation and Desilting Practices in A Runoff Reservoir on Heavy Sediment-Laden River 1

Siltation and Desilting Practices in A Runoff Reservoir on H...

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1st International Symposium on Water System Operations, ISWSO 2018

作者： Wang, Dangwei Deng, Anjun ji, zuwen Shi, Hongling State Key Laboratory of Simulation and Regulation of River Basin Water Cycle Beijing100048 China China Institute of Water Resources and Hydropower Research Beijing100048 China

Sediment deposition in the reservoir of run-of-the-river power station is severe, in this paper we take upper Marsyangdi reservoir as an example to analyze sedimentation and desilting process according field data measured from September 2016 when the reservoir had just been impounded in order to find strategy for managing reservoir sedimentation. The ratio of Upper Marsyangdi reservoir capacity and volume of sediment into the reservoir is about 0.2. The reservoir arrived silt-stable in a year after impoundment with a depth of 12m deposition at the dam site. Most of sediment deposit in the periods that at the initial and the end of flood reason and it is found the flow rate is the key factor influencing trap efficiency because that due to damming velocity of medium flow decreased significantly compared to natural condition which caused numerous deposition. Based on result of analysis of deposition the desilting condition is determined. Empty flushing is proposed to release deposition after flood season when flow rate is greater than 100m3/s and the new capacity will last to next flood season. In order to reduce sediment concentration into diversion channel a desilting should be done in flood season when flow rate is larger than 200m3/s and flow rate for impound should not be more than 1/10 of that into reservoir which can avoid deposition during impoundment near dam site. © The Authors, published by EDP Sciences, 2018.

关键词： Reservoirs (water)

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黄河河口演变与流路稳定关键技术研究

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人民黄河 2020年第9期42卷 66-70,129页

作者：余欣吉祖稳王开荣窦身堂王万战陈沈良黄河水利委员会黄河水利科学研究院河南郑州450003 水利部黄河泥沙重点实验室河南郑州450003 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100048 华东师范大学河口海岸学国家重点实验室上海200241

黄河河口清水沟流路清8汊河已进入流路自然演变的末期。为此,界定了出汊、改道、流路稳定及黄河河口稳定的内涵,系统分析了近期黄河河口水沙及流路、海岸的新变化,通过试验研究了尾闾河道出汊机制,综合提出出汊阈值、触发条件以及黄河... 详细信息

黄河河口清水沟流路清8汊河已进入流路自然演变的末期。为此,界定了出汊、改道、流路稳定及黄河河口稳定的内涵,系统分析了近期黄河河口水沙及流路、海岸的新变化,通过试验研究了尾闾河道出汊机制,综合提出出汊阈值、触发条件以及黄河河口流路稳定综合判别指标。在此基础上,预判了清水沟清8汊河的稳定性,提出近期流路安排应优先考虑北汊河。

关键词：河口演变海岸侵蚀出汊机制流路稳定指标黄河

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