Ecological Water Demand in the Typical Polder of Dongting Lake

Total Page：16

File Type：pdf, Size：1020Kb

Ecological Water Demand in the Typical Polder of Dongting Lake

EGU2020-7057 https://doi.org/10.5194/egusphere-egu2020-7057 EGU General Assembly 2020 © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Ecological water demand in the typical polder of Dongting Lake Yi Cai1, Lihua Tang2, Dazuo Tian3, and Xiaoyi Xu4 1Tsinghua University, Institute of Hydrology and Water Resources (IHWR), Department of Hydraulic Engineering, Beijing,China ([email protected]) 2Tsinghua University, Institute of Hydrology and Water Resources (IHWR), Department of Hydraulic Engineering, Beijing,China ([email protected]) 3Hunan Institute of Water Resources and Hydropower Research，Changsha Hunan,China([email protected]) 4Hunan Institute of Water Resources and Hydropower Research，Changsha Hunan,China([email protected]) Dongting Lake is the largest lake in the middle reaches of the Yangtze River in China. After the completion of the Three Gorges Project, the relationship between the Yangtze River and Dongting Lake has a significant change with the decreased diversion ratio. Besides, due to the overexploitation of local human activities, some dry-up reaches appeared in the Dongting Lake region, especially in the polders with high strength human activities. In order to scientifically understand the evolution law of water resources in those protective embankments in lakeside areas, and understand the relationship between human activities and ecosystem stability, the study works on the ecological water demand that coupled with the ecological capacity of the environment. As a typical polder, the Yule polder is selected as a case study in the Dongting Lake region. The objective is to obtain the ecological water demand process which can maintain the requirements of water quantity and quality of water to maintain water ecological needs under the condition of significant human impacts. Based on the actual situation of vegetation coverage, aquatic organism growth status and protection goals, and water demand of the industrial and agricultural population, taking the satisfaction degree of ecological water demand as an indicator, healthy of local water ecology is to be evaluated. Combining the hydrological situation of entire Yangtze River basin, the temporal distribution characteristics of ecological water demand in the Yule polder is analyzed, and also the feasibility of measures such as diverting Yangtze River water to alleviate the fragility of water ecology in the Dongting Lake region is discussed. These results could provide experience for solving similar problems in other regions. Powered by TCPDF (www.tcpdf.org).

Copy Link

Recommended publications

Report on the State of the Environment in China 2016
2016 The 2016 Report on the State of the Environment in China is hereby announced in accordance with the Environmental Protection Law of the People ’s Republic of China. Minister of Ministry of Environmental Protection, the People’s Republic of China May 31, 2017 2016 Summary.................................................................................................1 Atmospheric Environment....................................................................7 Freshwater Environment....................................................................17 Marine Environment...........................................................................31 Land Environment...............................................................................35 Natural and Ecological Environment.................................................36 Acoustic Environment.........................................................................41 Radiation Environment.......................................................................43 Transport and Energy.........................................................................46 Climate and Natural Disasters............................................................48 Data Sources and Explanations for Assessment ...............................52 2016 On January 18, 2016, the seminar for the studying of the spirit of the Sixth Plenary Session of the Eighteenth CPC Central Committee was opened in Party School of the CPC Central Committee, and it was oriented for leaders and cadres at provincial and ministerial
[Show full text]
Dongting Lake Newsletter, July 2020
Dongting Lake Newsletter July 2020 - Issue #5 © FAO © Protection and Management Progress Review of 2019 Winter GCP/CPR/043/GFF Highlights Officer of the Asia-Pacific Regional Office of Food and Agriculture Organization of the United Nations 1. The fourth Project Steering Committee meeting was (FAO), Yao Chunsheng, Global Environment Facility successfully held in Changsha. (GEF) Project Officer of the FAO China Office, Deng Weiping, Director of Finance Department of Hunan 2. The Management Plan of four Nature Reserves in Province, Tang Yu, Director of Department of Dongting Lake has been drafted. Ecological Environment of Hunan Province, other members of the Project Steering Committee, and 3. The capacity building for staff of Project Management representatives of project technical experts participated Office (PMO) and four Nature Reserves has been gradually in the meeting. enhanced. The agenda of the meeting includes: 1) review the project 4. The international and domestic exchange activities and work in 2019; 2) arrange the work plan and budget trainings have been carried out. for 2020; 3) discuss financial management, mid- term evaluation of the project, and promotion of 5. Publicity and promotion activities proceed steadily. project achievements; 4) review the progress made by community co-management; 5) discuss the compilation 1. PROJECT MANAGEMENT of teaching materials for biodiversity conservation in Dongting Lake. 1.1 Fourth Meeting of Project Steering Participants also carried out on-site investigation Committee on ecological fishery in Qingshan Island and bird- friendly comprehensive agriculture co-management In January 2020, the fourth Project Steering model in Yueyang County. Committee meeting of the project was held in Changsha, Hunan Province.
[Show full text]
Speciation of Trace Elements in Sediments from Dongting Lake, Central China
Water Pollution VIII: Modelling, Monitoring and Management 119 Speciation of trace elements in sediments from Dongting Lake, central China Z. G. Yao1, Z. Y. Bao1, 2, P. Gao3, J. L. Zhang1, Y. P. Guo1, Z. J. Hu3 & B. L. Li3 1State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, People’s Republic of China 2Faculty of Earth Sciences, China University of Geosciences, Wuhan, People’s Republic of China 3Xinjiang Bureau of Geology and Mineral Exploration and Development, Urumqi, People’s Republic of China Abstract A BCR three-step sequential extraction procedure, with a sediment reference material (BCR701), was used in order to assess the environmental risk of Cd, Cr, Cu, Ni, Pb, and Zn in contaminated sediment from Dongting Lake. The total metal content was determined as well. Dongting Lake, the second largest fresh-water lake in China, contains three China wetlands of international importance. In the Dongting Lake sediments, the trace elements (Cu, Zn, Cr, and Ni) analyzed are mainly distributed in a residual phase at an average percentage greater than 60% of the total metals, especially 79% for Cr and 90% for Ni; but Pb in Fe/Mn oxhydroxides phase (59%) and Cd in soluble species and carbonates (51%). The potential risk to the lake’s water contamination was highest in East Dongting Lake based on the calculated contamination factors. Therefore, there is an urgent need to protect Dongting Lake from anthropogenic sources of pollution to reduce environmental risks. Keywords: Dongting Lake, sediment, geo-accumulation index, speciation, contamination factor, trace elements, major elements.
[Show full text]
Variation of Water Level in Dongting Lake Over a 50-Year Period
Journal of Hydrology 525 (2015) 450–456 Contents lists available at ScienceDirect Journal of Hydrology journal homepage: www.elsevier.com/locate/jhydrol Variation of water level in Dongting Lake over a 50-year period: Implications for the impacts of anthropogenic and climatic factors ⇑ ⇑ Yujie Yuan, Guangming Zeng , Jie Liang , Lu Huang, Shanshan Hua, Fei Li, Yuan Zhu, Haipeng Wu, Jiayu Liu, Xiaoxiao He, Yan He College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China article info summary Article history: Understanding the variation regularity of water level and the potential drivers can provide insights into Received 27 January 2015 lake conservation and management. In this study, inter- and inner-annual variations of water level in Received in revised form 10 March 2015 Dongting Lake during the period of 1961–2010 were analyzed to determine whether anthropogenic or Accepted 7 April 2015 climatic factor should be responsible for the variations. The results showed that water level decreased Available online 12 April 2015 significantly during the period of 1961–1980, while increased significantly during the period of 1981– This manuscript was handled by Geoff Syme, Editor-in-Chief 2002 at the 5% significance level. However, the variation trend of water level after 2002 did not reach a significant level. The variation in the dry season was more obviously than that in the wet season. The date when water level was firstly below 24 m during the period of 2003–2010 appeared about Keywords: Water level 27 days earlier than usual, and the date was even advanced to mid-September in 2006.
[Show full text]
Hydrological Drought in Dongting Lake Area (China) After the Running of Three Gorges Dam and a Possible Solution
water Article Hydrological Drought in Dongting Lake Area (China) after the Running of Three Gorges Dam and a Possible Solution Yizhuang Liu 1,2,3, Shu-Qing Yang 4 , Changbo Jiang 1,2,3,*, Yuannan Long 1,2,3 , Bin Deng 1,2,3 and Shixiong Yan 1 1 School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China; [email protected] (Y.L.); [email protected] (Y.L.); [email protected] (B.D.); [email protected] (S.Y.) 2 Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China 3 Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China 4 School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong 2522, Australia; [email protected] * Correspondence: [email protected]; Tel.: +86-0731-8525-8437 Received: 24 August 2020; Accepted: 25 September 2020; Published: 28 September 2020 Abstract: Dongting Lake is located at the downstream of Three Gorges Dam (TGD) and the hydrological drought is intensified after the impoundment of TGD as the dry period has been extended from 123 days/year before the operation of TGD (1981–2002) to 141 days/year (2003–2016) on average. Particularly, the Dongting Lake’s water shortage becomes very severe. To solve the problem caused by upstream dams, an innovative flood control scheme (IFCS) was introduced, and its feasibility of application in Dongting Lake is studied using the hydrodynamic module of Mike 21. The results show the IFCS can effectively convert the peak discharge of floodwater in wet seasons into water resources in dry seasons as the IFCS could significantly increase the usable water storage of the lake.
[Show full text]
Large Water Management Projects and Schistosomiasis Control, Dongting Lake Region, China Yue-Sheng Li,*† Giovanna Raso,†‡ Zheng-Yuan Zhao,*§ Yong-Kang He,* Magda K
Large Water Management Projects and Schistosomiasis Control, Dongting Lake Region, China Yue-Sheng Li,*† Giovanna Raso,†‡ Zheng-Yuan Zhao,*§ Yong-Kang He,* Magda K. Ellis,† and Donald P. McManus† Construction of the Three Gorges Dam across the will be completed in 2009, and the dam’s generated power Yangtze River will substantially change the ecology of the is expected to supply ≈10% of the electricity needs of the Dongting Lake in southern China. In addition, the Chinese People’s Republic of China. After completion, the dam will Central and Hunan Provinces’ governmental authorities be 2,300 m long and 185 m high, and the resulting 600-km- have instigated a Return Land to Lake Program that will long reservoir created by the dam will inundate 115,000 extend the Dongting Lake surface area from the current acres of cultivated land. Hundreds of villages and countless 2,681 km2 to 4,350 km2.The previous construction of em- bankments and the large silt deposits made by the Yangtze historical relics and archeological and cultural sites will be River and other connecting rivers have contributed to fre- submerged; ≈1.4 million persons will be resettled from this quent disastrous ﬂ ooding. As a consequence of the 2 water area (1–3). The construction of the dam will change the projects, >2 million persons and their domestic animals are distribution of water and sand downstream from the dam being resettled. This article provides an overview of the his- and thus will have a strong effect on ecologic systems such torical background of these 2 large water management proj- as Dongting Lake in Hunan Province (Figure 1).
[Show full text]
The 7-Decade Degradation of a Large Freshwater Lake in Central
Environ. Sci. Technol. 2005, 39, 431-436 freshwater is stored in these lakes, but also because they The 7-Decade Degradation of a provide habitats for aquatic fauna and flora (3). However, Large Freshwater Lake in Central freshwater lake watersheds have been focal points of human settlement due to their suitable environment for development Yangtze River, China and food production (4, 5); therefore, the freshwater lakes have been disturbed by human activities to a greater extent ² ,² as compared to terrestrial ecosystems. The alteration of lake SHUQING ZHAO, JINGYUN FANG,* habitats has been found to influence biodiversity for fresh- SHILI MIAO,³ BEN GU,³ SHU TAO,§ water lake systems (6, 7). How freshwater lakes change under CHANGHUI PENG,| AND ZHIYAO TANG² the impacts of human activities and what ecological con- Department of Ecology, College of Environmental Sciences, sequences the lake alterations bring to biodiversity have and Key Laboratory for Earth Surface Processes of the Ministry received increasing attention. Unfortunately, there have been of Education, Peking University, Beijing, China, 100871, surprisingly few studies conducted at the decadal time scale, Everglades Division, South Florida Water Management especially from a heavily populated developing region. District 3301, Gun Club Road, West Palm Beach, Florida 33406, Department of Resources Dongting Lake was once the largest freshwater lake in ∼ 2 and Geoenvironmental Sciences, College of Environmental China, reaching its maximum surface area of 6300 km in Sciences, and Key Laboratory for Earth Surface Processes of 1825 (8). However, the present lake surface area is ap- the Ministry of Education, Peking University, proximately 40% (∼2500 km2) of its maximum size.
[Show full text]
Observing Changes in Lake Level and Glacial Thickness on the Tibetan Plateau with the Icesat Laser Altimeter
Observing changes in lake level and glacial thickness on the Tibetan Plateau with the ICESat laser altimeter Vu Hien Phan Observing changes in lake level and glacial thickness on the Tibetan Plateau with the ICESat laser altimeter Proefschrift ter verkrijging van de graad van doctor aan de Technische Universiteit Delft, op gezag van de Rector Magnificus prof. ir. K.C.A.M. Luyben, voorzitter van het College voor Promoties, in het openbaar te verdedigen op Maandag 26 January 2015 om 15:00 uur door Vu Hien PHAN Master of Engineering in Mapping, Remote Sensing and GIS Ho Chi Minh City University of Technology, Vietnam geboren te Sa Dec, Vietnam. - i - Dit proefschrift is goedgekeurd door de promoto: Prof. dr. M. Menenti Copromotor: Dr. R.C. Lindenbergh Samenstelling promotiecommissie: Rector Magnificus, voorzitter Prof. dr. M. Menenti Technische Universiteit Delft, promotor Dr. R.C. Lindenbergh Technische Universiteit Delft, copromotor Prof. dr. M. Scaloni Tongji University Prof. dr. ir. Z. Su Universiteit Twente Prof. dr. ir. N.C. van de Giesen Technische Universiteit Delft Dr. J. Kropacek Universität Tübingen Dr. N. Gourmelen The University of Edinburgh Prof. dr. W.G.M. Bastiaanssen Technische Universiteit Delft, reservelid Copyright 2015 by Vu Hien Phan. All rights reserved. No part of the material protected by this copyright notice may be reproduced or utilized in any form or by any means, electronic, mechanical, including photocopying, recording or by any information storage and retrieval system, without the prior permission of the author. ISBN 978-94-6186-426-0 Author email: [email protected] or [email protected] - ii - Preface Many people contributed to the successful completion of this thesis in different ways.
[Show full text]
2019 July Tibet Digest Final
Tibet Digest July 2019 FOUNDATION FOR NON-VIOLENT ALTERNATIVES Tibet Digest is a monthly publication brought out by FNVA containing relevant news pertaining to Tibet, Chinese politics and Sino Indian relations that appear mostly but not restricted to the Chinese state media. www.fnvaworld.org (under update) 143, 4th Floor, Uday Park, New Delhi, 49 ofﬁ[email protected] TIBET DIGEST, JULY 2019 ! !1 July 2019 1 China’s Tibet Policy 6 320 villages listed as key rural tourism spots 6 China dispatches 2,307 young cadres in aid for Tibet, Qinghai 6 Tibet relics to be exhibited in Beijing 7 Tibetans Beaten, Detained in Kardze Over Dalai Lama Photos 7 11th Panchen Lama goes to Ngari for Buddhist activities 8 Tibetan Jailed in Qinghai For Listening to Foreign News Broadcasts is Freed Early For ‘Good Behavior’ 9 26 prehistoric human activity sites discovered on Qinghai-Tibet Plateau 9 Tibet funds poor students through paper recycling 10 Reservation required for visiting Potala Palace 10 Top political advisor stresses ethnic, religious affairs, poverty alleviation 10 Tibetan Buddhism Suppressed: Lamas Closely Monitored, Temple Destroyed 11 Lhasa posts double-digit increase of visitor arrivals 12 Travel Restrictions Imposed on Sichuan’s Yachen Gar Buddhist Center 12 Communist China to provide ‘guidance’ to temples, churches 13 China denies reports of having Xinjiang-like mass detention camps in Tibet 14 Top political adviser praises work of religious committee 14 China forces tourists to install an app that steals data 15 Thousands of Monks, Nuns ‘Politically
[Show full text]
SCIENCE CHINA China's Lakes at Present: Number, Area and Spatial
SCIENCE CHINA Earth Sciences • RESEARCH PAPER • February 2011 Vol.54 No.2: 283–289 doi: 10.1007/s11430-010-4052-6 China’s lakes at present: Number, area and spatial distribution MA RongHua1*, YANG GuiShan1, DUAN HongTao1, JIANG JiaHu1, WANG SuMin1, FENG XueZhi2, LI AiNong3, KONG FanXiang1, XUE Bin1, WU JingLu1 & LI ShiJie1 1 State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; 2 Department of Geographic Information Science, Nanjing University, Nanjing 210093, China; 3 Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China Received April 7, 2010; accepted July 13, 2010; published online October 16, 2010 Based on 11004 satellite images from CBERS CCD and Landsat TM/ETM, changes in the spatial characteristics of all lakes in China were determined following pre-established interpretation rules. This dataset was supported by 6843 digital raster images (1:100000 and 1:50000), a countrywide digital vector dataset (1:250000), and historical literature. Comparative data were cor- rected for seasonal variations using precipitation data. There are presently 2693 natural lakes in China with an area greater than 1.0 km2, excluding reservoirs. These lakes are distributed in 28 provinces, autonomous regions and municipalities and have a total area of 81414.6 km2, accounting for ~0.9% of China’s total land area. In the past 30 years, the number of newly formed and newly discovered lakes with an area greater than 1.0 km2 is 60 and 131, respectively. Conversely, 243 lakes have disap- peared in this time period.
[Show full text]
Spatial–Temporal Variations of Total Nitrogen and Phosphorus in Poyang, Dongting and Taihu Lakes from Landsat-8 Data
water Article Spatial–Temporal Variations of Total Nitrogen and Phosphorus in Poyang, Dongting and Taihu Lakes from Landsat-8 Data Wei Shang 1,2, Shuanggen Jin 2,3,* , Yang He 1,2, Yuanyuan Zhang 3 and Jian Li 3 1 College of Sciences, Shanghai University, Shanghai 200444, China; [email protected] (W.S.); [email protected] (Y.H.) 2 Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China 3 School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; [email protected] (Y.Z.); [email protected] (J.L.) * Correspondence: [email protected] or [email protected]; Tel.: +86-21-3477-5292 Abstract: Poyang Lake, Dongting Lake, and Taihu Lake are the largest freshwater lakes in the middle and lower reaches of the Yangtze River, China. In recent years, the eutrophication level of lakes has increased with the development of the social economy and caused many environmental and social problems. The concentrations of total nitrogen (TN) and total phosphorus (TP) are the key indicators of the degree of eutrophication, but the traditional ground monitoring methods are not capable of capturing such parameters in whole lakes with high spatial-temporal resolution. In this paper, empirical models are established and evaluated between the TN and TP and remote sensing spectral factors in the three lakes using Landsat 8 Operational Land Imager (OLI) satellite data and in-situ data. The results show that the inversion accuracy is higher than 75%. The TN and TP concentrations in the three lakes are inversed based on the Google Earth Engine (GEE) platform from 2014 to 2020 and their spatial-temporal variations are analyzed.
[Show full text]
Getting Serious About Birding in China
Birding 04-06 China 2/9/06 1:55 PM Page 54 BIRDING IN THE OLD WORLD Getting Serious about Birding in China hen Zhong Jia took her first birding lesson in 1997, she never expected she would be organizing China’s first na- W tional birding contest some five years later. Lin Jianyang “I never cared much about pets or wild animals before,” confesses the senior journal- ist with the People’s Daily based in Beijing. “I just took part casually in birding activity China Features in a Beijing park, but started to become intrigued by what the instructor said about 57 Xuanwumen Xijie birds. There is so much about them! I found it a good challenge to learn all about Beijing 100803 them—their identification, habitats, migration routes, diet, etc.” China Besides, she says, as an office worker she enjoyed the opportunity get close to Nature through birding. “All at once I became addicted to it,” says the 49-year-old journalist. “I [email protected] think their wisdom—or the wisdom of Nature—as manifested in their pretty colors, liv- ing styles, and behaviors, is so fascinating, and they give much inspiration to me as a human being.” In the past few years, Zhong has never missed one of the weekly lectures on birding given by professors from Beijing Normal University. And she has been to many places to watch birds, such as the beach at Beidaihe in North China, the grasslands of Inner Mon- golia, the Yellow River delta in the east, forests in Central China, and lake areas in the south.
[Show full text]