Balancing Growth and Preservation: Protection and Management of Nanxun Historic Water Town

2013 ◽  
Vol 368-370 ◽  
pp. 411-416
Author(s):  
Shan Jin ◽  
Hai Bo Huang ◽  
Kun Liu
Keyword(s):  
Social Development ◽  
Yangtze River ◽  
The Yangtze River ◽  
Historic Sites ◽  
Environmental Pressures ◽  
Factors Affecting ◽  
New Development ◽  
Outstanding Universal Value ◽  
Protective Strategy ◽  
The Town

Today in the context of contemporary rapid economic and social development many of the Chinese historic sites are being destroyed to make a way for new development, which is resulting in the abrupt disappearance of character and identity of the unique places. Nanxun historic water town is the most representative and unique water town in South of the Yangtze River. This paper analyzes the outstanding universal value of Nanxun historic water town, addresses the factors affecting the town such as development pressures, tourism pressures, and environmental pressures. It proposes the protective strategy for water towns in South of the Yangtze River, so that it can provide the useful experience for other historic sites in China.

Application of unstructured grid finite-volume coastal ocean model (FVCOM) to the Yangtze River hypoxic zone

2016 ◽  
Vol 26 (8) ◽  
pp. 2410-2418 ◽  
Author(s):  
Zhanhong Wan ◽  
Zongfu Ren ◽  
Xiaochun Wang ◽  
Honghao Zheng
Keyword(s):  
Finite Volume ◽  
Yangtze River ◽  
River Flow ◽  
Ocean Model ◽  
Trade Wind ◽  
Freshwater Flux ◽  
The Yangtze River ◽  
Content Type ◽  
Factors Affecting ◽  
Coastal Ocean Model

Purpose To observe the relations between three important factors resulting in estuarial Hypoxia phenomena of Yangtze River – wind, river flow, and stratification. The purpose of the paper is to analyze the possible reasons why hypoxia occurs in late spring and disappears in October. Design/methodology/approach To overcome the difficulty in examining the role of physical and biological factors affecting hypoxia based on measurement alone, finite-volume community ocean model (FVCOM) was introduced into the investigation. Observed freshwater flux data from Yangtze River, monthly averaged wind speed data, and other observed data were input into the model; the accuracy of which was validated with various kinds of data. The authors used the trajectories of Lagrangian particles from Yangtze River to study the regions of strong riverine influence under different wind forcing conditions and compared the simulation results with former observations. Findings Trade wind is a significant factor to influence the forming and receding of hypoxia across the Yangtze River. Originality/value Using FVCOM to investigate estuary hypoxia is more economical and effective.

scholarly journals Research on the Supply Efficiency of Marine Ecological Products in the Yangtze River Delta Costal Urban Agglomerations Based on DEA-Tobit Model

2021 ◽  
Vol 13 (12) ◽  
pp. 6840
Author(s):  
Yixiong He ◽  
Weiming Song ◽  
Fan Yang
Keyword(s):  
Yangtze River ◽  
Yangtze River Delta ◽  
River Delta ◽  
Marine Ecology ◽  
The Yangtze River ◽  
New Thought ◽  
Factors Affecting ◽  
Existing Problems ◽  
Starting Point ◽  
The Yangtze River Delta

In this research, we choose the coastal cities in the Yangtze River Delta as the subjects of study, including Shanghai, Lianyungang, Yancheng, Nantong, Jiaxing, Ningbo, Zhoushan, Taizhou, and Wenzhou, nine cities in total. With marine ecological products as the starting point and the supply efficiency of marine ecological products in each city as the subjects of research, and after collecting a quantity of data and by constructing the efficiency analyzing modes, we analyze the supply efficiency of those cities with the involved supplying service, cultural service, and value of regulating service as the output, and the operation of related authorities as the input of marine ecological products. Meanwhile, combining with the outside factors affecting the supply efficiency, we explore and identify the existing problems of marine ecology products in this region, such as the unreasonable supply structure, regional development imbalance, marine environment quality degrading, etc., and present the corresponding solutions and rationalization proposal for the existing problems, thus providing a new thought for promoting the development of the Yangtze River Delta, especially for marine activities.

scholarly journals Hydrochemical Characteristics and Quality Assessment of Shallow Groundwater in Yangtze River Delta of Eastern China

2021 ◽  
Author(s):  
Taotao Lu ◽  
Runzhe Li ◽  
Aira Sacha Nadine Ferrer ◽  
Shuang Xiong ◽  
Pengfei Zou ◽  
...  
Keyword(s):  
Health Risks ◽  
Yangtze River ◽  
Shallow Groundwater ◽  
Yangtze River Delta ◽  
River Delta ◽  
The Yangtze River ◽  
Hydrochemical Characteristics ◽  
Factors Affecting ◽  
The Yangtze River Delta

Abstract The water resource is highly demanded in the Yangtze River Delta with a developed economy. Long-term exploitation has posed threats of artificial pollution and seawater intrusion to the shallow groundwater. This study aimed to reveal the hydrochemical characteristics and health risks of shallow groundwater in the coastal plain of the Yangtze River Delta. Also, possible factors affecting groundwater quality were discussed. Methods, such as typical hydrochemical tests, water quality assessment and health risk models, were applied to achieve the study targets. The results showed that the shallow groundwater was slightly alkaline, and the average values of total dissolved solids (TDS) and total hardness (TH) were 930.74 mg/L and 436.20 mg/L, respectively. The main hydrochemical types of groundwater were Ca+Mg–HCO3 and Ca/Na–HCO3, accounting for 44.3% and 47.5%, respectively. In addition, As concentration was generally high, with a mean value of 0.0115 mg/L. The principal factors affecting the groundwater components include water-rock interactions (especially silicate), cation exchange, seawater intrusion and human activities. As in the groundwater is strongly influenced by the redox of Fe, Mn, and NO3-. The results of the groundwater quality evaluation indicated that the shallow groundwater in some regions was unsuitable for drinking and agricultural irrigation. Health risk assessment showed that 44.3% of the water samples had significant health risks, which was attributed to the high As concentration. Therefore, it is urgent to establish long-term As monitoring to maintain sustainable groundwater management and drinking water safety. The results of this study can provide essential data for water resource management and human health protection in the Yangtze River Delta.

scholarly journals Spatiotemporal Heterogeneity and Driving Force Analysis of Innovation Output in the Yangtze River Economic Zone: The Perspective of Innovation Ecosystem

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Ke Liu ◽  
Yurong Qiao ◽  
Qian Zhou
Keyword(s):  
Yangtze River ◽  
The Yangtze River ◽  
Innovation Ecosystem ◽  
Factors Affecting ◽  
Geographical Concentration ◽  
Leading Role ◽  
Innovation Output ◽  
Economic Zone ◽  
Concentration Degree ◽  
Strategic Support

The Yangtze River Economic Zone (YREZ) is a major corridor of national science and innovation culture, an innovation-driven region that fosters new drivers of growth and leads transformation and development, and plays an important strategic support and exemplary leading role in the overall pattern of regional development. This paper analyzes the spatiotemporal differentiation characteristics of innovation output of 110 cities of YREZ from 2008 to 2018 by using Gini coefficient, coefficient of variation (CV), geographical weighted regression, and other methods. The factors affecting innovation output are selected from the perspective of innovation ecosystem. The results show the following. (1) Innovation output showed an increasing trend, and the high-value concentration cities in downstream areas gradually became prominent, the geographical concentration degree fluctuated and declined, and the distribution of innovation output gradually became balanced. (2) The global Moran’s I index of innovation output shows a fluctuation pattern of “M” shape and an overall upward trend. The analysis of local spatial correlation indicates that spatial distribution pattern of innovation output has not changed significantly. (3) There is obvious regional heterogeneity under different impacts of factors of innovation ecosystem on innovation output. Enterprises have the greatest impact, followed by financial resources and infrastructure environment.

scholarly journals Organising a juvenile ratio monitoring programme for 10 key waterbird species in the Yangtze River floodplain: analysis and proposals

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuxi Wang ◽  
Iderbat Damba ◽  
Qingshan Zhao ◽  
Yanbo Xie ◽  
Xueqing Deng ◽  
...  
Keyword(s):  
Population Size ◽  
Age Structure ◽  
Yangtze River ◽  
Monitoring Programme ◽  
Optimal Time ◽  
The Yangtze River ◽  
Important Indicator ◽  
Factors Affecting ◽  
River Floodplain ◽  
Waterbird Species

Abstract Background In the face of continued degradation and loss of wetlands in the Yangtze River floodplain (YRF), there is an urgent need to monitor the abundance and distribution of wintering waterbirds. To understand fully observed annual changes, we need to monitor demographic rates to understand factors affecting global population size. Annual reproduction success contributes to dynamic changes in population size and age structure, so an assessment of the juvenile ratio (i.e. first winter birds as a proportion of total number aged) of overwintering waterbirds can be an important indicator of the reproductive success in the preceding breeding season. Methods During 2016–2019, we sampled juvenile ratios among 10 key waterbird species from the wetlands in the YRF. Based on these data, we here attempt to establish a simple, efficient, focused and reliable juvenile ratio monitoring scheme, to assess consistently and accurately relative annual breeding success and its contribution to the age structure among these waterbird species. Results We compared juvenile ratio data collected throughout the winter and found that the optimal time for undertaking these samples was in the early stages of arrival for migratory waterbirds reaching their wintering area (early to mid-December). We recommend counting consistently at key points (i.e. those where > 1% biogeographical flyway population were counted) at sites of major flyway importance (Poyang Lake, East Dongting Lake, Shengjin Lake, Caizi Lake, Longgan Lake and Chen Lake). Based on this, the error rate of the programme (155 planned points, the count of 10 waterbird species is 826–8955) is less than 5%. Conclusions We established a juvenile ratio monitoring programme for 10 key waterbird species in the wetlands of the YRF, and discuss the feasibility and necessity of implementing such a future programme, and how to use these data in our monitoring and understanding of the population dynamics of these waterbird populations.

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