Table S1. Water Level Change Rates of Lakes/Reservoirs in the MLYB
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Spatiotemporal Evolution of Lakes Under Rapid Urbanization: a Case Study in Wuhan, China
water Article Spatiotemporal Evolution of Lakes under Rapid Urbanization: A Case Study in Wuhan, China Chao Wen 1, Qingming Zhan 1,* , De Zhan 2, Huang Zhao 2 and Chen Yang 3 1 School of Urban Design, Wuhan University, Wuhan 430072, China; [email protected] 2 China Construction Third Bureau Green Industry Investment Co., Ltd., Wuhan 430072, China; [email protected] (D.Z.); [email protected] (H.Z.) 3 College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; [email protected] * Correspondence: [email protected]; Tel.: +86-139-956-686-39 Abstract: The impact of urbanization on lakes in the urban context has aroused continuous attention from the public. However, the long-term evolution of lakes in a certain megacity and the heterogeneity of the spatial relationship between related influencing factors and lake changes are rarely discussed. The evolution of 58 lakes in Wuhan, China from 1990 to 2019 was analyzed from three aspects of lake area, lake landscape, and lakefront ecology, respectively. The Multi-Scale Geographic Weighted Regression model (MGWR) was then used to analyze the impact of related influencing factors on lake area change. The investigation found that the total area of 58 lakes decreased by 15.3%. A worsening trend was found regarding lake landscape with the five landscape indexes of lakes dropping; in contrast, lakefront ecology saw a gradual recovery with variations in the remote sensing ecological index (RSEI) in the lakefront area. The MGWR regression results showed that, on the whole, the increase in Gross Domestic Product (GDP), RSEI in the lakefront area, precipitation, and humidity Citation: Wen, C.; Zhan, Q.; Zhan, contributed to lake restoration. -
Seasonal Succession of Bacterial Communities in Three Eutrophic Freshwater Lakes
International Journal of Environmental Research and Public Health Case Report Seasonal Succession of Bacterial Communities in Three Eutrophic Freshwater Lakes Bin Ji, Cheng Liu, Jiechao Liang and Jian Wang * Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan 430065, China; [email protected] (B.J.); [email protected] (C.L.); [email protected] (J.L.) * Correspondence: [email protected]; Tel.: +86-27-68893616 Abstract: Urban freshwater lakes play an indispensable role in maintaining the urban environment and are suffering great threats of eutrophication. Until now, little has been known about the seasonal bacterial communities of the surface water of adjacent freshwater urban lakes. This study reported the bacterial communities of three adjacent freshwater lakes (i.e., Tangxun Lake, Yezhi Lake and Nan Lake) during the alternation of seasons. Nan Lake had the best water quality among the three lakes as reflected by the bacterial eutrophic index (BEI), bacterial indicator (Luteolibacter) and functional prediction analysis. It was found that Alphaproteobacteria had the lowest abundance in summer and the highest abundance in winter. Bacteroidetes had the lowest abundance in winter, while Planctomycetes had the highest abundance in summer. N/P ratio appeared to have some relationships with eutrophication. Tangxun Lake and Nan Lake with higher average N/P ratios (e.g., N/P = 20) tended to have a higher BEI in summer at a water temperature of 27 ◦C, while Yezhi Lake with a relatively lower average N/P ratio (e.g., N/P = 14) tended to have a higher BEI in spring and autumn at a water temperature of 9–20 ◦C. -
Environmental Changes in Chaohu Lake (Southeast, China) Since the Mid 20Th Century: the Interactive Impacts of Nutrients, Hydrology and Climate
Limnologica 43 (2013) 10–17 Contents lists available at SciVerse ScienceDirect Limnologica journal homepage: www.elsevier.com/locate/limno Environmental changes in Chaohu Lake (southeast, China) since the mid 20th century: The interactive impacts of nutrients, hydrology and climate Xu Chen a,b, Xiangdong Yang a,∗, Xuhui Dong a, Enfeng Liu a a State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China b Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, People’s Republic of China article info abstract Article history: Chaohu Lake, the fifth largest freshwater lake in the Yangtze floodplain, is faced with multiple stresses Received 21 June 2011 from anthropogenic disturbances and climate change. To explore the ecological changes in Chaohu Lake Received in revised form 31 October 2011 since the mid 20th century, we examined diatoms, geochemical indicators and particle size in 210Pb- Accepted 6 March 2012 dated sediment core from the lake. Diatom succession revealed that the lake had switched to a eutrophic Available online 11 June 2012 state since the late 1970s. Redundancy analysis using limnological data, hydrological and meteorological variables showed that sedimentary total phosphorus (TP) and total organic carbon (TOC), annual mean Keywords: temperature, annual mean wind velocity, and water-level amplitude (WLA) were five significant factors Diatoms Nutrient loading influencing diatom succession. Diatom assemblages from 1950 till 1978 were driven by WLA and wind. Hydrological alteration The establishment of Chaohu Dam baffled hydrological connectivity between the lake and the Yangtze Climate warming River in 1962, and reducing water exchange-induced flow. -
Supplement of a Systematic Examination of the Relationships Between CDOM and DOC in Inland Waters in China
Supplement of Hydrol. Earth Syst. Sci., 21, 5127–5141, 2017 https://doi.org/10.5194/hess-21-5127-2017-supplement © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License. Supplement of A systematic examination of the relationships between CDOM and DOC in inland waters in China Kaishan Song et al. Correspondence to: Kaishan Song ([email protected]) The copyright of individual parts of the supplement might differ from the CC BY 3.0 License. Figure S1. Sampling location at three rivers for tracing the temporal variation of CDOM and DOC. The average widths at sampling stations are about 1020 m, 206m and 152 m for the Songhua River, Hunjiang River and Yalu River, respectively. Table S1 the sampling information for fresh and saline water lakes, the location information shows the central positions of the lakes. Res. is the abbreviation for reservoir; N, numbers of samples collected; Lat., latitude; Long., longitude; A, area; L, maximum length in kilometer; W, maximum width in kilometer. Water body type Sampling date N Lat. Long. A(km2) L (km) W (km) Fresh water lake Shitoukou Res. 2009.08.28 10 43.9319 125.7472 59 17 6 Songhua Lake 2015.04.29 8 43.6146 126.9492 185 55 6 Erlong Lake 2011.06.24 6 43.1785 124.8264 98 29 8 Xinlicheng Res. 2011.06.13 7 43.6300 125.3400 43 22 6 Yueliang Lake 2011.09.01 6 45.7250 123.8667 116 15 15 Nierji Res. 2015.09.16 8 48.6073 124.5693 436 83 26 Shankou Res. -
Planning Strategy and Practice of Low-Carbon City Construction , 46 Th ISOCARP Congress 2010
Zhang Wentong, Planning Strategy and Practice of Low-carbon City Construction , 46 th ISOCARP Congress 2010 Planning Strategy and Practice of Low-carbon City Construction Development in Wuhan, China Zhang Wentong Yidong Hu I. Exploration on Planning of Low-carbon City Construction under the Global Context The concept of low-carbon is proposed in the context of responding to global climate change and advocating reducing the discharge of greenhouse gases in human’s production activities. While in the urban area, the low-carbon city is evolved gradually from the concept of ecological city, and these two can go hand in hand. The connotation of low-carbon city has also changed from the environment subject majoring in reducing carbon emission to a comprehensive subject including society, culture, economy and environment. Low-carbon city has become a macro-system synthesizing low-carbon technology, low-carbon production & consumption mode and mode of operation of low-carbon city. At last it will be amplified to the entire level of ecological city. The promotion of low-carbon city construction has a profound background of times and practical significance. Just as Professor Yu Li from Cardiff University of Great Britain has summed up, at least there are reasons from three aspects for the promotion of low-carbon city construction: firstly, reduce the emission of carbon through the building of ecological cities and return to a living style with the harmonious development between man and the nature; secondly, different countries hope to obtain a leading position in innovation through exploration on ecological city technology, idea and development mode and to lead the construction of sustainable city of the next generation; thirdly, to resolve the main problems in the country and local areas as well as the problem of “global warming”. -
Determination of Geochronology and Sedimentation Rates of Shallow Lakes in the Middle Yangtze Reaches Using 210Pb, 137Cs and Spheroidal Carbonaceous Particles
Determination of geochronology and sedimentation rates of shallow lakes in the middle Yangtze reaches using 210Pb, 137Cs and spheroidal carbonaceous particles Xu Chen1*, Qianglong Qiao1, Suzanne McGowan2, Linghan Zeng1,2, Mark A Stevenson3, Lei Xu1, Chunling Huang1, Jia Liang1, Yanmin Cao4 1State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China 2School of Geography, University of Nottingham, Nottingham NG7 2RD, UK 3School of Natural and Environmental Sciences, Newcastle University, Newcastle- upon-Tyne NE1 7RU, UK 4College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China *Corresponding author; e-mail address: [email protected] https://doi.org/10.1016/j.catena.2018.11.041 Catena Abstract: Accurate chronologies for recent sediments of shallow lakes in the Yangtze floodplain are critical to calibrate proxy records for reconstructing environmental changes during the past century. This study presents the results of detailed 210Pb analysis from eight lake sediment cores collected from the middle Yangtze reaches, 210 southeast China. Unsupported Pb activities generally declined exponentially with mass depth in the eight cores. The chronologies and sedimentation rates for the sediment cores were calculated using different 210Pb-based mathematical models. The 137Cs chronomarker (i.e. the 1963 fallout peak) and the spheroidal carbonaceous particle (SCP) chronomarker (i.e. the start of the rapid increase in 1970 AD) were selected to validate the 210Pb dating. Sedimentation rates derived from different models were validated using historical data including lake area, arable land area, sediment discharge and reservoir volume in the Yangtze basin. The SCP-corrected CRS (constant rate of supply) model performs better than other models, based on validation using historical documents in the Yangtze basin. -
Conservation Status Assessment and a New Method for Establishing Conservation Priorities for Freshwater Mussels
Received: 8 March 2018 Revised: 9 November 2019 Accepted: 17 December 2019 DOI: 10.1002/aqc.3298 RESEARCH ARTICLE Conservation status assessment and a new method for establishing conservation priorities for freshwater mussels (Bivalvia: Unionida) in the middle and lower reaches of the Yangtze River drainage Xiongjun Liu1,2 | Xue Yang3 | David T. Zanatta4 | Manuel Lopes-Lima5 | Arthur E. Bogan6 | Alexandra Zieritz7,8 | Shan Ouyang3 | Xiaoping Wu1,2,3 1Key Laboratory of Poyang Lake Environment and Resource Utilization, School of Resources Abstract Environmental and Chemical Engineering, 1. The freshwater mussel (Unionida) fauna of the Yangtze River is among the most Nanchang University, Nanchang, People's Republic of China diverse on Earth. In recent decades, human activities have caused habitat degra- 2School of Resources Environmental & dation in the river, and previous studies estimated that up to 80% of the mussel Chemical Engineering, Nanchang University, species in the Yangtze River are Threatened or Near Threatened with extinction. Nanchang, People's Republic of China 3School of Life Sciences, Nanchang University, However, a comprehensive and systematic evaluation of the conservation status Nanchang, People's Republic of China of this fauna has yet to be completed. 4 Central Michigan University, Institute for 2. This study evaluated the conservation status of the 69 recognized freshwater Great Lakes Research, Mount Pleasant, MI mussel species in the middle and lower reaches of the Yangtze River, using the 5CIBIO/InBIO – Research Center -
Technical Assistance Consultant's Report People's Republic of China
Technical Assistance Consultant’s Report Project Number: 42011 November 2009 People’s Republic of China: Wuhan Urban Environmental Improvement Project Prepared by Easen International Co., Ltd in association with Kocks Consult GmbH For Wuhan Municipal Government This consultant’s report does not necessarily reflect the views of ADB or the Government concerned, and ADB and the Government cannot be held liable for its contents. (For project preparatory technical assistance: All the views expressed herein may not be incorporated into the proposed project’s design. ADB TA No. 7177- PRC Project Preparatory Technical Assistance WUHAN URBAN ENVIRONMENTAL IMPROVEMENT PROJECT Final Report November 2009 Volume I Project Analysis Consultant Executing Agency Easen International Co., Ltd. Wuhan Municipal Government in association with Kocks Consult GmbH ADB TA 7177-PRC Wuhan Urban Environmental Improvement Project Table of Contents WUHAN URBAN ENVIRONMENTAL IMPROVEMENT PROJECT ADB TA 7177-PRC FINAL REPORT VOLUME I PROJECT ANALYSIS TABLE OF CONTENTS Abbreviations Executive Summary Section 1 Introduction 1.1 Introduction 1-1 1.2 Objectives of the PPTA 1-1 1.3 Summary of Activities to Date 1-1 1.4 Implementation Arrangements 1-2 Section 2 Project Description 2.1 Project Rationale 2-1 2.2 Project Impact, Outcome and Benefits 2-2 2.3 Brief Description of the Project Components 2-3 2.4 Estimated Costs and Financial Plan 2-6 2.5 Synchronized ADB and Domestic Processes 2-6 Section 3 Technical Analysis 3.1 Introduction 3-1 3.2 Sludge Treatment and Disposal Component 3-1 3.3 Technical Analysis for Wuhan New Zone Lakes/Channels Rehabilitation, Sixin Pumping Station and Yangchun Lake Secondary Urban Center Lake Rehabilitation 3-51 3.4 Summary, Conclusions and Recommendations 3-108 Section 4 Environmental Impact Assessment 4.1 Status of EIAs and SEIA Approval 4-1 4.2 Overview of Chinese EIA Reports 4-1 Easen International Co. -
Diatom Community Succession and Nutrient Evolution Recorded from a Sediment Core of the Longgan Lake, a Large Shallow Lake in East China
第 30 卷 第 6 期 水 生 生 物 学 报 Vol . 30 ,No . 6 2 0 0 6 年 1 1 月 ACTA HYDROBIOLOGICA SINICA Nov. , 2 0 0 6 DIATOM COMMUNITY SUCCESSION AND NUTRIENT EVOLUTION RECORDED FROM A SEDIMENT CORE OF THE LONGGAN LAKE, A LARGE SHALLOW LAKE IN EAST CHINA DONG Xu2Hui and YANG Xiang2Dong ( Nanjing Institute of Geography &Limnology , the Chinese Academy of Sciences , Nanjing 210008 , China) Abstract :The Longgan Lake is a shallow mesotrophic macrophyted2ominated lake. According to the high2resolution diatom research from its sediment core , the diatom community succession was built , and the total phosphorus (TP) and chlorophyll2a (Chl2a) con2 centration were quantitatively reconstructed for the past 2000 years , based on the diatom2TP and diatom2Chla transfer functions. The shifts of diatom assemblages also mirrored the developments of aquatic plant , reflecting the characters of aquatic ecosystem evolution. The inferred epilimnetic TP concentration fluctuated within a small range of 36 to 62μg/ L , indicating the lake remained a relative stable mesotrophic status in the long historical period. The periodical variations of the diatom assemblage and trophic sta2 tus suggest a mitigating function of shallow macrophyte2dominated lakes to nutrient input. The changes of lakesptrophic status donpt linearly respond to the human disturbance in the catchment. The dynamics mechanism of phosphorus in macrophyte2dominated lakes , as inferred from diatoms , will provide a scientific foundation for the prediction of trophic status change in a shallow lake , as well as the lake ecological restoration and management decisions. Key words :Diatom assemblage ; Nutrient ; Quantitative reconstruction ; Aquatic macrophyte ; Longgan Lake CLC number :X172 Document code :A Article ID :100023207(2006) 0620702209 The importance of aquatic vegetation to the ecologi2 on the environment reconstruction based on the sediment cal restoration has been recognized commonly by limnolo2 biomarker such as diatom have made rapid gists and lake managements[1 —4 ] . -
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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 -
Potential Indicator Value of Subfossil Gastropods in Assessing the Ecological Health of the Middle and Lower Reaches of the Yangtze River Floodplain System (China)
geosciences Article Potential Indicator Value of Subfossil Gastropods in Assessing the Ecological Health of the Middle and Lower Reaches of the Yangtze River Floodplain System (China) Giri Kattel 1,2,3,*, Yongjiu Cai 1, Xiangdong Yang 1, Ke Zhang 1, Xu Hao 4, Rong Wang 1 and Xuhui Dong 5 1 State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China; [email protected] (Y.C.); [email protected] (X.Y.); [email protected] (K.Z.); [email protected] (R.W.) 2 Environmental Hydrology and Water Resources Group, Department of Infrastructure Engineering, University of Melbourne, Melbourne, Parkville, VIC 3010, Australia 3 Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China 4 Hoan Environmental Monitoring Corporation, Nanjing 210008, China; [email protected] 5 School of Geographical Sciences, Gunagzhou University, Guangzhou 510006, China; [email protected] * Correspondence: [email protected]; Tel.: +61-428-171-180 Received: 20 April 2018; Accepted: 15 June 2018; Published: 17 June 2018 Abstract: The lakes across China’s middle and lower reaches of the Yangtze River system have a long history of sustaining human pressures. These aquatic resources have been exploited for fisheries and irrigation over millennia at a magnitude of scales, with the result that many lakes have lost their ecological integrity. The consequences of these changes in the ecosystem health of lakes are not fully understood; therefore, a long-term investigation is urgently needed. Gastropods (aquatic snails) are powerful bio-indicators that link primary producers, herbivores, and detritivores associated with macrophytes and grazers of periphyton and higher-level consumers.