Journal articles: 'Pearl River'

1

Hill, Jeanne Foster. "The Pearl River." Hudson Review 38, no. 2 (1985): 271. http://dx.doi.org/10.2307/3851017.

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Lu, X. X., S. R. Zhang, S. P. Xie, and P. K. Ma. "Rapid channel incision of the lower Pearl River (China) since the 1990s as a consequence of sediment depletion." Hydrology and Earth System Sciences 11, no. 6 (2007): 1897–906. http://dx.doi.org/10.5194/hess-11-1897-2007.

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Abstract. This paper reported a dramatic channel incision (>10 m in the deepest cut) during the past 10 y or so in the lower Pearl River, the second largest river in terms of water discharge in China. The channel incision had caused changes both in the channel geometry as well as in the river hydraulics. Also, the water exchange between the two major tributaries of the Pearl River, the Xijiang and Beijiang, had been significantly changed due to the channel incision. The rapid channel incision was principally the result of extensive sand mining in the lower Pearl River and the delta region due to the booming economy in the Pearl Delta region. Slight increase of water discharge and significant decrease of sediment load since the early 1990s in both the Xijiang and Beijiang also likely contributed to the observed dramatic river bed downcutting to some extent. This has important implications for river management, as the large Chinese rivers have seen a dramatic depletion of sediment fluxes due to the combined effects of declining rainfall, dam constructions, water diversion, reforestation and afforestation, and sediment mining over the recent decades.

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3

Lu, X. X., S. R. Zhang, S. P. Xie, and P. K. Ma. "Rapid channel incision of the lower Pearl River (China) since the 1990s." Hydrology and Earth System Sciences Discussions 4, no. 4 (2007): 2205–27. http://dx.doi.org/10.5194/hessd-4-2205-2007.

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Abstract. This paper reported a dramatic channel incision (>10 m in the deepest cut) during the past 10 years or so in the lower Pearl River, the second largest river in terms of water discharge in China. The channel incision had caused changes both in the channel geometry as well as in the river hydraulics. Also, the water exchange between the two major tributaries of the Pearl River, the Xijiang and Beijing, had been significantly changed due to the channel incision. The rapid channel incision was principally the result of extensive sand mining in the lower Pearl River and the delta region due to the booming economy in the Pearl Delta region. Slight increase of water discharge and significant decrease of sediment load since the early 1990s in both the Xijiang and Beijiang also likely contributed to the observed dramatic river bed donwcutting to some extent. This has important implications for river management, as the large Chinese rivers have seen a dramatic depletion of sediment fluxes due to the combined effects of declining rainfall, dam constructions, water diversion, reforestation and afforestation, and sediment mining over the recent decades.

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4

He, Jie, and Wen Jie Xin. "Hydrodynamic Impact on Pearl River Estuary from HZM Bridge." Applied Mechanics and Materials 488-489 (January 2014): 475–78. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.475.

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The HZM(Hongkong-Zhuhai-Macao) bridge connects Hongkong, Zhuhai and Macao district, and it strctchs across the Pearl River estuary. A lot of piers and three large artifical islands would have some impact on the hydrodynamic environment in the Pear River estuary. In this paper, a 2D tidal current numerical model is introduced to simulate the hydrodynamic impact from the HZM brdige. The simulated results show that the Hydrodynamic influence is concentrated on the 5.0 km range from downstream to upstream nearby the navigation zone and the 1.0 km range of bridge site in not-navigation zone, and the tidal range reduction is limited 0.03m and the tidal prism reduction is not more than 1% in the Lingding Sea after the HZM bridge constructed. Therefore, the HZM bridge has little influence on the distribution of hydrodynamic environment in the Pearl River estuary.

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Gao, Feng, Yunpeng Wang, Xinyi Hu, Chao Xu, and Ned Horning. "Spatiotemporal variations of total suspended matter (TSM) in the Pearl River estuary using MERIS full-resolution (FR) level-2 TSM product." Marine and Freshwater Research 70, no. 8 (2019): 1065. http://dx.doi.org/10.1071/mf18111.

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In this study, we first use self-organising map (SOM) and medium-resolution imaging spectrometer (MERIS) full-resolution (FR) level-2 total suspended matter (TSM) product to identify spatial-distribution patterns of TSM concentration in the Pearl River estuary. Second, the spatial and temporal variation of TSM concentration in the Pearl River estuary was investigated using 9-year (2003–2011) MERIS FR level-2 TSM products. The spatial-distribution patterns of TSM concentration identified by SOM in the Pearl River estuary showed that there are high values in west and north and low values in east and south. On the basis of the analysis of the sample points randomly extracted from the Pearl River estuary, the results showed that the spatial variation of TSM in eight gates varied greatly, and the Lingdingyang Bay from Humen to offshore waters (i.e. Xitan, Zhongtan and Dongtan) presents a decreasing trend. Moreover, extreme climate events (e.g. EI Niño and La Niña) may have a great effect on spatial and temporal variation of TSM concentration in the Pearl River estuary. These results could provide a new insight for a better understanding of the dynamics of TSM concentration in the Pearl River estuary and the effect of soil- and water-conservation measures in the upstream of Pearl River.

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6

Williams, Michael. "Hong Kong and the Pearl River Delta Qiaoxiang." Modern Asian Studies 38, no. 2 (2004): 257–82. http://dx.doi.org/10.1017/s0026749x04001076.

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In the history of links between people from the Pearl River Delta with the countries of South-East Asia and the Pacific, the role played by Hong Kong cannot be ignored. It is the purpose here to examine the role and contribution of Hong Kong to these Pearl River Delta links over the period 1842 to 1942. Such an examination, it is hoped, will also allow the impact of Pearl River Delta links on Hong Kong to be investigated. Much of the material presented by this paper is not new, rather the aim is to view Hong Kong from the perspective of the Pearl River Delta qiaoxiang. A perspective, it is suggested, that will enable aspects of Hong Kong's history and its contribution to the history of the Pearl River Delta counties and their overseas links to be seen in a new way.

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Wang, Yingliang, Chengzao Huang, Mingyuan Wu, and Yuncheng Feng. "Huangpu Pearl River Bridge, China." Structural Engineering International 22, no. 3 (2012): 380–84. http://dx.doi.org/10.2749/101686612x13363869853536.

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Zhang, Qiang, Xihui Gu, Vijay P. Singh, Peijun Shi, and Peng Sun. "More frequent flooding? Changes in flood frequency in the Pearl River basin, China, since 1951 and over the past 1000 years." Hydrology and Earth System Sciences 22, no. 5 (2018): 2637–53. http://dx.doi.org/10.5194/hess-22-2637-2018.

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Abstract. Flood risks across the Pearl River basin, China, were evaluated using a peak flood flow dataset covering a period of 1951–2014 from 78 stations and historical flood records of the past 1000 years. The generalized extreme value (GEV) model and the kernel estimation method were used to evaluate frequencies and risks of hazardous flood events. Results indicated that (1) no abrupt changes or significant trends could be detected in peak flood flow series at most of the stations, and only 16 out of 78 stations exhibited significant peak flood flow changes with change points around 1990. Peak flood flow in the West River basin increased and significant increasing trends were identified during 1981–2010; decreasing peak flood flow was found in coastal regions and significant trends were observed during 1951–2014 and 1966–2014. (2) The largest three flood events were found to cluster in both space and time. Generally, basin-scale flood hazards can be expected in the West and North River basins. (3) The occurrence rate of floods increased in the middle Pearl River basin but decreased in the lower Pearl River basin. However, hazardous flood events were observed in the middle and lower Pearl River basin, and this is particularly true for the past 100 years. However, precipitation extremes were subject to moderate variations and human activities, such as building of levees, channelization of river systems, and rapid urbanization; these were the factors behind the amplification of floods in the middle and lower Pearl River basin, posing serious challenges for developing measures of mitigation of flood hazards in the lower Pearl River basin, particularly the Pearl River Delta (PRD) region.

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Huang, Liang, Haowei Ti, Leigang Pei, and Ding Ma. "Research on the Problems and Development of Small and Medium Enterprises in the Pearl River Delta." E3S Web of Conferences 218 (2020): 04006. http://dx.doi.org/10.1051/e3sconf/202021804006.

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Since the reform and opening up, the economy of the Pearl River Delta has achieved rapid development and remarkable results. Small and medium-sized enterprises in the region have also achieved rapid development in terms of quantity and quality, and have become an important part of the region. However, with economic globalization, because of continuous changes in the external environment, and its own industrial upgrading and structural adjustment, even if small and medium-sized enterprises in the Pearl River Delta region have advantages compared with other regions in China. However, there are still problems in the development process. The article mainly analyzes the financing difficulties of SMEs in the Pearl River Delta region and the brain drain in recent years, and gives corresponding countermeasures. Since small and medium-sized enterprises occupy an important position in the economy of the Pearl River Delta region, they can not only promote technological innovation and boost domestic demand for production, but also drive the employment rate to rise. Therefore, the development of small and medium-sized enterprises in the region has played a positive role in the economic progress of the Pearl River Delta region, and the place has also promoted economic development.

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10

Zhao, Run-Hua, Jie Cheng, and Nai-Ru Xu. "The Earnings Management Strategy of List Companies in Pearl River Delta Region of China Based on Complex Network Theory." Complexity 2020 (December 10, 2020): 1–5. http://dx.doi.org/10.1155/2020/6650193.

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This paper aims to detect the methods of earnings management in Pearl River Delta region of China. The data were selected based on the list companies of Pearl River Delta region from 2008 to 2019 and the balanced panel analysis was adopted to pursue the results. After the random effect analysis, this study reaches the conclusion that downward earnings is through total assets, the difference between sales and receivables, fixed assets, and sales and upward earnings is mainly through the changes of sales by the companies in Pearl River Delta region of China.

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11

Zheng, Ming Zhu, and Gao Zhong Yang. "The Humen Pearl River Bridge, China." Structural Engineering International 8, no. 2 (1998): 93–95. http://dx.doi.org/10.2749/101686698780489379.

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12

Wei, He, Long Hua Gao, He Qin Chen, and Jiu Fa Li. "Study on Discharge Distribution Ratio Variation of Main Connection Nodes in Pearl River Delta, in Wet Season, China." Advanced Materials Research 347-353 (October 2011): 1883–86. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.1883.

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In recent years,with the high speed development of economy in Pearl River delta, infrastructure investment for water resource,traffic,environmental protection is growing.It is increasingly urgent for understanding river nets system and discharge distribution ratio variation of main connection nodes.Discharge distribution ratio of each nodes is relative to the runoff of upper boundary and the tidal power of lower boundary.The Pearl River estuary is divided into far mouth section,near mouth section and estuary section.Discharge distribution ratio of every section varieties with upper and lower boundary conditions.In this paper,Based on the observational data of June in 1998 and June in 2005,combining with history data,analysis discharge distribution ratio variation of main connection nodes of the Pearl River delta.and set up a mathematical model to simulate flow variation characters.The conclusion is, in recent years Discharge distribution ratio of the east four outlets increases, namely the ratio of West River flowing into North River and North River into the main channel of the Pearl River.with the flood discharge increasing,The ratio of the longitudinal branches occupies the smaller proportion than that of latitude branches.

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13

Hu, Yu Ping, Hua Yin, and Zhi Jian Wang. "On E-Commerce Development Strategies of Pearl River Delta Region." Applied Mechanics and Materials 278-280 (January 2013): 1795–98. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.1795.

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The development of e-commerce in the Pearl River Delta Region has benefited from its sound environment. It is one of the important measures to develop e-commerce forward a new industrial road, which can promote IT-based industrialization, change the mode of economic development and improve the quality and efficiency of the national economy. This paper presents the current situation of e-commerce development in the Pearl River Delta region, analyzes its development advantages and tendency, and concludes with some existed problems and the further development countermeasures of the Pearl River Delta Region e-commerce.

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Shuai, Fangmin, Xinhui Li, Wanling Yang, Weitao Chen, and Sovan Lek. "Habitat use of the Japanese eel (Anguilla japonica) and marbled eel (Anguilla marmorata) in the large subtropical Pearl River." Annales de Limnologie - International Journal of Limnology 57 (2021): 8. http://dx.doi.org/10.1051/limn/2021001.

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Anguilla spp. are catadromous fish and with a high economic value in Asia. The Pearl River is the largest river in southern China and is an important area for wild populations of Anguilla spp. However, until now, there has been little research on the eel's population structure and habitat use in the Pearl River. This study analyzed the population structure and habitat use characteristics of the Japanese eel (Anguilla japonica) and the marbled eel (Anguilla marmorata) in the Pearl River based on data collected from 2015 to 2018. A total of 181 Japanese eels and 56 marbled eels were collected, over half of which were middle-sized eels between 255 and 600 mm in length. Although they are sister species, Japanese eels mainly inhabit complex river habitats characterized by high river fractals and coefficients of fluvial facies, while marbled eels mainly inhabit wider and deeper river sections. The impact of physical environmental factors (such as river fractals, coefficients of fluvial facies and river width) on the distribution of these two species is greater than the impact of small-scale water quality environmental factors (such as DO concentration, temperature and clarity). The results of this study showed that wild Anguilla spp. resources in the Pearl River were extremely low and there was an urgent need for conservation and management of eel resources in south China.

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Zhou, Lei, Weiyuan Chen, Jijia Sun, Li Liu, and Xiande Huang. "Spatial Variation in Bacterioplankton Communities in the Pearl River, South China: Impacts of Land Use and Physicochemical Factors." Microorganisms 8, no. 6 (2020): 814. http://dx.doi.org/10.3390/microorganisms8060814.

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River ecosystems are critical for human and environmental health, with bacterioplankton playing a vital role in biogeochemical cycles. Unveiling the spatial patterns of bacterioplankton communities in relation to environmental factors is important for understanding the processes of microbial variation and functional maintenance. However, our understanding of the correlations among bacterioplankton communities, physicochemical factors, and land use, especially in large rivers affected by intensive anthropogenic activities, remains relatively poor. Here, we investigated the bacterioplankton communities in July 2018 in three main tributaries of the Pearl River, i.e., Beijiang, Xijiang, and Pearl River Delta, based on 16S rRNA high-throughput sequencing. Results showed that the most dominant phyla, Proteobacteria, Actinobacteria, Cyanobacteria, and Planctomycetes accounted for 33.75%, 22.15%, 11.65%, and 10.48% of the total abundance, respectively. The bacterioplankton communities showed remarkable differences among the three tributaries in terms of composition, structure, diversity, and predictive functional profiles. Mantel and partial Mantel tests revealed that the bacterioplankton communities were affected by physicochemical variables (p < 0.01) and land use (p < 0.01). Redundancy analysis identified specific conductivity, dissolved oxygen, agricultural land, ammonium, urban land, and water transparency as the dominant environmental factors influencing the bacterioplankton communities in the Pearl River. Variation partitioning analysis indicated that both physicochemical factors and land use had direct effects on the bacterioplankton community, and that land use may also shape bacterioplankton communities through indirect effects of physicochemical factors on riverine ecosystems. This study provides fundamental information on the diversity, spatial patterns, and influencing factors of bacterioplankton communities in the Pearl River, which should enhance our understanding of how such communities change in response to environmental gradients and anthropogenic activities.

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Wu, Yan. "Research on the Spatial Spillover Effect of the Collaborative Innovation of Science and Technology in the Pearl River Delta Urban Agglomeration." E3S Web of Conferences 253 (2021): 01013. http://dx.doi.org/10.1051/e3sconf/202125301013.

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This paper uses spatial panel VAR model to study the spatial spillover of the collaborative innovation of Science and technology in the Pearl River Delta urban agglomeration from 2010 to 2018. The empirical results show that a positive shock on the collaborative innovation of Science and technology of a city in the Pearl River Delta urban agglomeration will spread to other cities in the Pearl River Delta urban agglomeration, and will have a positive impact on the collaborative innovation of Science and technology and R & D input variables of other cities in the second period; A positive shock on the R & D input of a city will make the collaborative innovation of Science and technology and R & D input variables of the city and other cities have a positive impact in the second period; the collaborative innovation of Science and technology and R & D input variables have positive external effects in the Pearl River Delta urban agglomeration. Finally, some suggestions are put forward.

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Qin, Xiaoqun, Zhongcheng Jiang, Liankai Zhang, Qibo Huang, and Pengyu Liu. "Effects of atmospheric CO2 consumption on rock weathering in the Pearl River basin, China." E3S Web of Conferences 98 (2019): 06011. http://dx.doi.org/10.1051/e3sconf/20199806011.

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Atmospheric CO2 is absorbed and dissolved in water via karst processes not only in carbonate rock areas, but in all rock areas of the earth. The chemical and isotopic analysis results, particularly of strontium, for water samples collected from eleven stations along the Pearl River, four times over the course of one year, showed that due to weathering by carbonate or silicate rocks, HCO3-, Ca2+, and Mg2+ have become the main ions in the river water. Through river ion stoichiometric and flux calculations, the carbonate rock weathering rate and atmospheric CO2 consumption were found to be 27.6 mm/ka and 540 x 103 mol/km2.a, which are 10.8 and 6.7 times the corresponding values for silicate rock. With the beneficial climatic conditions for rock erosion and large areas of carbonate rock in the Pearl River Basin, the atmospheric CO2 consumption value is about 2.6 times the average value for the 60 major rivers in the world.

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Miao, Huazhang, Bing Li, Wu Li, et al. "Adverse birth outcomes in Guangdong province, China, 2014–2017: a spatiotemporal analysis of 2.9 million births." BMJ Open 9, no. 11 (2019): e030629. http://dx.doi.org/10.1136/bmjopen-2019-030629.

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ObjectivesAdverse birth outcomes pose a great threat to the public health and bring a heavy burden of disease in China. A comprehensive examination of the temporal and spatial trends of preterm birth (PTB), low birth weight (LBW) and small for gestational age (SGA) epidemics can provide some elementary information for subsequent aetiological and epidemiological studies. This study aimed to characterise the spatiotemporal features of PTB, LBW and SGA based on a large cohort of live births in China.DesignSpatiotemporal descriptive analysis was performed in Guangdong province, China, from 2014 to 2017.SettingData involving 2 917 098 live births in Guangdong province, China from 2014 to 2017 was collected from Guangdong Birth Certificate System. Information was collected, including the date of birth, gestational age in week, birth weight, sex of the infant, age of the mother and registered residence of the mother.ResultsThe estimated rate of PTB, LBW and SGA was 4.16%, 4.14% and 12.86%, respectively. For temporal trends, the rates of PTB, LBW and SGA showed seasonal fluctuations, especially for LBW and SGA. In addition, there were regional differences in the rates of PTB, LBW and SGA between the Pearl River Delta and Non-Pearl River Delta regions. From 2014 to 2017, the high rates of PTB and LBW expanded from the Pearl River Delta region to the Non-Pearl River Delta regions. However, compared with the Pearl River Delta region, the rate of SGA was higher in the Non-Pearl River Delta regions on the whole.ConclusionThe findings of this study contribute to the understanding of the aetiology and epidemiology of PTB, LBW and SGA in south China.

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Wang, Xianwei, Yu Guo, and Jie Ren. "The Coupling Effect of Flood Discharge and Storm Surge on Extreme Flood Stages: A Case Study in the Pearl River Delta, South China." International Journal of Disaster Risk Science 12, no. 4 (2021): 1–15. http://dx.doi.org/10.1007/s13753-021-00355-5.

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AbstractThe low-lying Pearl River Delta in South China is subject to severe flood threats due to watershed floods, sea level rise, and storm surges. It is still unknown to what extent and how far inland storm surges and sea level rise impact the extreme flood stages. This study investigated the coupling effect of flood discharge and storm surge on the extreme flood stages in the Pearl River Delta by using on site observations and simulations generated by the Hydrologic Engineering Center-River Analysis System model. The results show that flood discharges dominated the flood stages in the middle and upper Pearl River Delta, while the storm surges had maximum impact near the river mouth. The storm surges and flood stages showed a significant increase after 2002 in the Hengmen waterway. The design flood stages for the post-2002 period were 0.23–0.89 m higher than the pre-2002 ones at Hengmen at the six return periods from 5 to 200 years examined in this study. Their difference declined toward the upper waterway and reduced to zero about 23 km away from the Hengmen outlet. The coincidence of extreme flood discharges and storm surges further escalates the extreme flood stages in the lower 30 km of estuarine waterways. Our results quantify the severe threats due to sea level rise and intensified storm surges in the lower Pearl River Delta, and are significant for urban planning and designing and managing flood control facilities in the Pearl River Delta and in other coastal fluvial deltas.

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Sun, Caige, Shengyong Zhang, Chuncheng Song, Jianhui Xu, and Fenglei Fan. "Investigation of Dynamic Coupling Coordination between Urbanization and the Eco-Environment—A Case Study in the Pearl River Delta Area." Land 10, no. 2 (2021): 190. http://dx.doi.org/10.3390/land10020190.

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The interaction between urbanization and the eco-environment is usually viewed as an effect–feedback framework. Its coupling system is composed of urbanization and eco-environment subsystems. In this paper, the coupling degree (CD) and the coupling coordinated degree (CCD) are used to reflect the coupling interaction and coupling coordination between the urbanization subsystem and the eco-environment subsystem. Based on the dynamic relative quantities of urbanization and eco-environment data in the Pearl River Delta, CD and CCD values were calculated, and the spatiotemporal evolution trend of coordination was analyzed. The results show that (1) from 2000 to 2015, the nine cities in the Pearl River Delta had high CD values and CCD values. Though they had different performances in different periods, they were all in a coordinated class, including good coordination (GC), moderate coordination (MC), and bare coordination (BC). (2) In terms of temporal evolution, the coupling coordination between urbanization and the eco-environment in the entire Pearl River Delta greatly improved. (3) From the perspective of spatial distribution, the coupling coordination of the central region was higher than that of the peripheral regions, and that of the west bank of the Pearl River was higher than that of the east bank of the Pearl River. These results can help local policy makers enact appropriate measures for sustainable development.

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Yang, Xiuqin, Bin Yong, Zhiguo Yu, and Yuqing Zhang. "An evaluation of CMIP5 precipitation simulations using ground observations over ten river basins in China." Hydrology Research 52, no. 3 (2021): 676–98. http://dx.doi.org/10.2166/nh.2021.151.

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Abstract Using the precipitation measurements obtained from 2,419 ground meteorological stations over China from 1960 to 2005 as benchmark, the performance of 21 single-mode precipitation data from the Coupled Model Intercomparison Project Phase 5 (CMIP5) were evaluated using Taylor diagrams and several statistical metrics. Based on statistical metrics, the models were ranked in terms of their ability to reproduce similar patterns in precipitation relative to the observations. Except in Southeast and Pearl river basins, research results show that all model ensemble means overestimate in the rest of the river basins, especially in Southwest and Northwest. The performance of CMIP5 models is quite different among each river basin; most models show significant overestimation in Northwest and Yellow and significant underestimations in Southeast and Pearl. The simulations are more reliable in Songhua, Liao, Yangtze, and Pearl than in other river basins according to spatial distribution and interannual variability. No individual model performs well in all the river basins both spatially and temporally. In Songhua, Liao, Yangtze, and Pearl, precipitation indices are more consistent with observations, and the spread among models is smaller. The multimodel ensemble selected from the most reasonable models indicates improved performance relative to all model ensembles.

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Yan, Muting, Huayue Nie, Kaihang Xu, et al. "Microplastic abundance, distribution and composition in the Pearl River along Guangzhou city and Pearl River estuary, China." Chemosphere 217 (February 2019): 879–86. http://dx.doi.org/10.1016/j.chemosphere.2018.11.093.

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Hu, Panpan, Feng Li, Xiao Sun, Yali Liu, Xinchuang Chen, and Dan Hu. "Assessment of Land-Use/Cover Changes and Its Ecological Effect in Rapidly Urbanized Areas—Taking Pearl River Delta Urban Agglomeration as a Case." Sustainability 13, no. 9 (2021): 5075. http://dx.doi.org/10.3390/su13095075.

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Based on the land-use data of 2000 and 2015, this study makes a quantitative analysis of the ecological environment effect in Pearl River Delta using the ecological environment quality index and the ecological contribution rate of land-use change types. The results showed the following: (1) During 2000–2015, the land-use changes in Pearl River Delta mainly manifested in the reduction of cultivated land, forest land, water area, and unused land, while the area of construction land and grassland showed an increasing trend. The quality of ecological environment in the Pearl River Delta was largely stable but slightly declined overall; (2) Over the past 15 years, the comprehensive ecological environment index of the Pearl River Delta urban agglomeration has decreased by 0.02. With an average annual decrease of 0.11%. The spatial expansion caused by urbanization had the most profound impact on the decline of the ecological environment quality in the Pearl River Delta; (3) The eco-environmental quality indices of various cities in the Pearl River Delta declined to varying degrees. The city with the largest decline was Dongguan, followed by Shenzhen and Zhongshan. The spatial differentiation characteristics of the eco-environmental quality index indicate that the ecological quality preferences of cities distributed around the study area and close to the inland areas, while the ecological quality of the central coastal cities are biased. The quality of the ecological environment is related to the basis of the regional ecological environment. The research results have important practical significance for maintaining regional ecological balance and promoting the sustainable use of land resources, and they provide a reference for the study of the ecological and environmental effects of land-use changes in key cities in economically developed areas.

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QIN, Chenglin, Ni HUO, and Zhaohui CHONG. "Intercity Rail Transit and Integrated Development of the Pearl River Delta Urban Cluster: Based on the Perspective of Network Analysis." Chinese Journal of Urban and Environmental Studies 03, no. 03 (2015): 1550024. http://dx.doi.org/10.1142/s2345748115500244.

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Intercity rail transit is an important power promoting the integrated development of urban clusters. This paper adopts a social network analysis to analyze the impact of the intercity rail development on the integration of the Pearl River Delta urban cluster in 2010, 2012, and 2020, respectively. The results show that the development of intercity rail transit is generally conducive to enhancing the network development trend of the Pearl River Delta urban cluster, strengthening the inter links and promoting the division of labor within the urban cluster, reinforcing the status of the center cities, thus promoting the integrated development of the Pearl River Delta urban cluster. However, the development of intercity rail transit still cannot break the former core–periphery structure, which may aggravate the unbalanced development among cities. Therefore, on the one hand, accelerating the construction of intercity rail transit is an important path to promote the integrated development of the Pearl River Delta urban cluster; on the other hand, it is necessary to optimize the intercity rail network planning, so that the adverse impact could be mitigated.

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Chuntao, Huang, Lu Jifu, and Liao Qifeng. "Analysis of the Spatial and Temporal Variation Characteristics of Ozone in the Pearl River Delta Region from 2016 to 2020." E3S Web of Conferences 245 (2021): 02025. http://dx.doi.org/10.1051/e3sconf/202124502025.

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Based on the historical data of air ozone monitoring of Pearl River Delta from 2016 to 2020, the temporal and spatial variation characteristics of ozone in the Pearl River Delta were analyzed. The results showed that the mean change curves of Q3 in the seven cities in the Pearl River Delta region from 2016 to 2020 were M-shaped, and the change trend was basically the same, except Huizhou and Zhuhai. The over standard rate of daily mean value of Q3 in Jiangmen City from 2016 to 2020 was more than 10%, and the over standard situation of daily mean value of Q3 was serious. In the Pearl River Delta region, the change trend of the monthly mean value of Q3 in the same year was basically the same. On the whole, the mean value from August to November was higher, and the mean value in June was lower. The peak of Q3 concentration appeared between 12:00 and 16:00 in the daytime, and it was generally low at night.

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Li, Kun Ming, and Li Hua Zhao. "Research on Thermal Environment of Village in Pearl River Delta Region." Applied Mechanics and Materials 368-370 (August 2013): 1881–87. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1881.

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At present the tradition layout and landscape characteristic of village are disappearing gradually in the Pearl River Delta region. With the rural residential branch out into high-density and multi-storey, the scale space in village is disappearing in the Pearl River Delta region. The wind field, temperature field, moisture and atmospheric particle distribution of village are changed along with the transition, which lead to the village thermal environment deteriorative. In view of this, the thermal environment of village is simulated, based on the 3D microclimate model ENVI-met. The simulation results show that the layout and the underlying surface structure of the village have a direct relationship with the air temperature and wind speed in village in the Pearl River Delta region.

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Zhao, Chu. "Technological Innovation to Optimize the Industrial Structure of Manufacturing in the Pearl River Delta." Advanced Materials Research 875-877 (February 2014): 1165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1165.

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Technical innovation is the necessary path for industry in Pearl River Delta to success in industrial transformation and upgrading, the research about how to keep the total increase in the basis as well as to optimize the export structure of manufacturing, and how to keep the whole manufacturing benefits of the Pearl River Delta region sustainably is very necessary. Firstly, this paper adopts the multiple regression analysis to analyze how the technological innovation to optimize the industrial structure of manufacturing in the Pearl River Delta region. Secondly, the author makes a detailed explanation about the technical innovations impact on the manufactured exports with three different technology levels (high-to-low). Finally, this paper offers some specific advice according to the analysis results.

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Daming, Zhou, and Zhang Yingqiang. "Rural Urbanization in Guangdong's Pearl River Delta." Chinese Sociology & Anthropology 28, no. 2 (1995): 47–102. http://dx.doi.org/10.2753/csa0009-4625280247.

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Marks, Robert. "Robert Marks on the Pearl River Delta." Environmental History 9, no. 2 (2004): 296. http://dx.doi.org/10.2307/3986088.

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Wang, Yingliang, Chengzao Huang, and Mingyuan Wu. "Pearl River Huangpu Southern Channel Bridge, China." Proceedings of the Institution of Civil Engineers - Bridge Engineering 167, no. 4 (2014): 265–78. http://dx.doi.org/10.1680/bren.11.00049.

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Chau, K. W., and Y. W. Jiang. "3D Numerical Model for Pearl River Estuary." Journal of Hydraulic Engineering 127, no. 1 (2001): 72–82. http://dx.doi.org/10.1061/(asce)0733-9429(2001)127:1(72).

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32

Yeung, Yue‐man. "Emergence of the pan‐pearl river delta." Geografiska Annaler: Series B, Human Geography 87, no. 1 (2005): 75–79. http://dx.doi.org/10.1111/j.0435-3684.2005.00179.x.

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33

Poon, Michelle, and Wilhelm E. J. Klein. "Identity Crisis in the Pearl River Delta." Digital Culture & Society 3, no. 1 (2017): 159–84. http://dx.doi.org/10.14361/dcs-2017-0111.

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Abstract This paper is a conversation-based reflection on hacker-, maker- and DIY-culture. It focuses on the unique cultural and socio-economic setting of Hong Kong, using Dim Sum Labs, its first hacker/makerspace as its primary subject of investigation. To provide context, we begin with an outline of the cultural, economic and physical challenges presented by Hong Kong. We then proceed to present and relay conversation pieces from interviews with members and non-members of Dim Sum Labs, who speak about their respective perspectives on notions of “hacking,” “making” and “DIY-culture.” Finally, we provide some reflections on our own experiences as members of the hacker/maker/ DIY-culture and past directors of Dim Sum Labs.

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Chen, Jay-Chung, Gary W. Heinke, and Ming Jiang Zhou. "The Pearl River Estuary Pollution Project (PREPP)." Continental Shelf Research 24, no. 16 (2004): 1739–44. http://dx.doi.org/10.1016/j.csr.2004.06.004.

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35

Wuying, Han, and Lin Hongying. "Carbon flux in Pearl River Estuarine Bays." Chinese Journal of Oceanology and Limnology 8, no. 2 (1990): 150–57. http://dx.doi.org/10.1007/bf02850447.

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Cui, W. Z., J. Chen, Y. P. Wu, and Y. D. Wu. "An overview of water resources management of the Pearl River." Water Supply 7, no. 2 (2007): 101–13. http://dx.doi.org/10.2166/ws.2007.045.

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This paper summarizes the main features of water resources management of the Pearl River basin in southern China. A regulation over the basin through integrating various regions was first established for enhancing the water resources management. Based on such a regulation, a public policy frame was then constructed aiming for the harmony between human activities and nature. It is hoped that, as a result, the basin's socio-economic sustainable development could be achieved. In practice, the Pearl River Water Resources Commission (PRWRC), which is the basin regulatory authority, has been focusing on various aspects of regulating water basin and conserving water resources. These aspects include the development of innovative regulations of treating water, exploration of compensation schemes for water resources prevention, investigation of the hydraulic engineering project impacts on region relocation and ecology, and establishment of marketing schemes for sustainable application of water resources. It is expected that these regulating water resources aspects would result in enhancing public participation and negotiation in the Pearl River basin management. A case study is presented on the PRWRC's effort in coordinating water discharges from a number of reservoirs to protect the safe water supply in the Pearl River basin from seawater intrusion during the dry season.

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Chen, Cheng, Xi Min Ji, Guang Xian Zhang, Feng Xiu Zhang, and Hui Zheng. "Preparing Gambiered Guangdong Silk with Ultraviolet Radiation and Normal Mud/Fe²⁺." Advanced Materials Research 690-693 (May 2013): 1358–61. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1358.

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in order that Gambiered Guangdong Silk can be made in normal area with modern technology, the ultraviolet radiation light was instead of sunlight, normal mud/Fe2+ was instead of Pearl River mud. The Gambiered Guangdong Silk was prepared by ultraviolet radiation light and normal mud/Fe2+. The result showed that ultraviolet radiation light and normal mud/Fe2+ could produce Gambiered Guangdong Silk. The color of silk fabric made by ultraviolet radiation light and normal mud/Fe2+ was almost same as that of silk fabric made by sunlight and Pearl River mud. The thickness of silk fabric made by ultraviolet radiation light and normal mud/Fe2+was approximate to that of ilk fabric made by sunlight and Pearl River mud. These means the Gambiered Guangdong Silk can be made in normal area.

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Fan, Xiaoyun, Baoshan Cui, and Zhiming Zhang. "Spatial variations of river water quality in Pearl River Delta, China." Frontiers of Earth Science 6, no. 3 (2012): 291–96. http://dx.doi.org/10.1007/s11707-012-0295-1.

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Li, Hui Hui Lisa, and Tsz Leung Yip. "Core Competences of River Ports: Case Study of Pearl River Delta." Asian Journal of Shipping and Logistics 32, no. 2 (2016): 99–105. http://dx.doi.org/10.1016/j.ajsl.2016.05.003.

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So, M. K., Y. Miyake, W. Y. Yeung, et al. "Perfluorinated compounds in the Pearl River and Yangtze River of China." Chemosphere 68, no. 11 (2007): 2085–95. http://dx.doi.org/10.1016/j.chemosphere.2007.02.008.

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Shuai, Fangmin, Xinhui Li, Fangchan Chen, Yuefei Li, and Sovan Lek. "Spatial patterns of fish assemblages in the Pearl River, China: environmental correlates." Fundamental and Applied Limnology 189, no. 4 (2017): 329–40. http://dx.doi.org/10.1127/fal/2016/0922.

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Li, Teng, Jinbao Li, Tsun Fung Au, and David D. Zhang. "Moisture Variability in the East Pearl River Basin since 1894 CE Inferred from Tree Ring Records." Atmosphere 11, no. 10 (2020): 1075. http://dx.doi.org/10.3390/atmos11101075.

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Short-term climate change in South China has been extensively studied based on meteorological or hydrological records. However, tree ring-based long-term climate change research is rare, especially in the Pearl River basin, owing to the difficulty in finding old-aged trees. Here, we present a 200-year tree ring width chronology of Pinus kwangtungensis in the east Pearl River basin with reliable coverage from 1894 to 2014. Based on the significant climate-growth relationship between tree growth and annual self-calibrating Palmer drought severity index (scPDSI) from previous May to current April, the pMay-cApr scPDSI was reconstructed for the period 1894–2014. The reconstruction reveals four dry periods during 1899–1924, 1962–1974, 1988–1994, and 2003–2014, and four wet periods during 1894–1898, 1925–1961, 1975–1987, and 1995–2002. Significant spatial correlations between the reconstructed scPDSI and the Climatic Research Unit (CRU) gridded scPDSI indicate that our reconstruction can effectively represent regional moisture variability in the Pearl River basin. Spatial correlations with global sea surface temperatures (SSTs) show that our reconstruction is negatively correlated with northern and western Pacific SSTs while positively correlated with eastern Pacific SSTs, suggesting that SST variability in these domains strongly affects moisture change in the Pearl River basin.

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Ouyang, R., W. Liu, G. Fu, C. Liu, L. Hu, and H. Wang. "Linkages between ENSO/PDO signals and precipitation, streamflow in China during the last 100 years." Hydrology and Earth System Sciences Discussions 11, no. 4 (2014): 4235–65. http://dx.doi.org/10.5194/hessd-11-4235-2014.

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Abstract. This paper investigates the single and combined impacts of the El Niño-Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) on precipitation and streamflow in China over the last century. Results indicate that the precipitation and streamflow overall decrease during the El Niño periods/PDO warm phase while mainly increase during the La Niña periods/PDO cool phase in the majority of China, although there are still regional and seasonal differences. Specifically, the precipitation/streamflow in the Yellow River basin, Yangtze River basin and Pearl River basin are more significantly influenced by El Niño and La Niña events compare to those in the Songhua River basin among different months, especially in the October and November. Moreover, the significant influences of ENSO on streamflow in the Yangtze River mainly occur in summer and autumn while that in the Pearl River primary occur in the winter and spring. The precipitation/streamflow are relatively more in the warm PDO phase in the Songhua River basin and several parts of Yellow River basin while are relatively less in the Pear River basin and the most parts of the northwest China compare to those in the cool PDO phase, though there are rarely significances clarified using the Wilcoxon signed ranks test. When considering the combined influences of ENSO and PDO, the responses of precipitation/streamflow are shown to be opposite from northern China to southern China, with the ENSO-related precipitation/streamflow enhance in the northern China during the warm PDO phases and that increase in the southern China in the cool PDO phases. This study conducted would beneficial for understanding how the precipitation/streamflow responses to the changing climate and would correspondingly provide valuable references for the water resources prediction and management over China.

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Tan, Chao, Ben Sheng Huang, Qing Shu Yang, and Jing Qiu. "Hydrodynamic Characteristics Change of the Pearl River Delta Channel Network in the Recent 50 Years." Advanced Materials Research 573-574 (October 2012): 415–20. http://dx.doi.org/10.4028/www.scientific.net/amr.573-574.415.

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The Pearl River delta channel network in the 1950s and 1990s is modeled and validated, and the hydrodynamic characteristic is analyzed during flood and drought at the same time. The study result shows that the model well simulates the real situation, which can be used for hydrodynamic characteristics analysis; There were obvious split ratio changes in the main branch in the late 50 years, the change degree of node in North River and near by is greater than West River’s. The waterlevel line of the West River main stream in the 1990s is generally lower than in the 1950s, especially the upstream of West River is more dramatic decline. River terrain changes caused by intensive human activities is the main reason why hydrodynamic force of the Pearl River Delta channel network district changed for the past 50 years.

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Yan, Yichen, Hongrun Ju, Shengrui Zhang, and Wei Jiang. "Spatiotemporal Patterns and Driving Forces of Urban Expansion in Coastal Areas: A Study on Urban Agglomeration in the Pearl River Delta, China." Sustainability 12, no. 1 (2019): 191. http://dx.doi.org/10.3390/su12010191.

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Since the beginning of the 21st century, the spatial pattern of urban expansion and the mechanism of urbanization in coastal areas have undergone significant changes. This study aims to reveal the spatiotemporal patterns of urban land expansion and analyze the dynamic driving forces of urban agglomeration in the Pearl River Delta of China from 2000 to 2015. The urban-land-expansion intensity index, expansion difference index, and fractal dimension were used to study how the urban land in this area was developed, and the geographical detector was applied to explore the relative importance, expansion intensity, and interactions of physical and socioeconomic factors. The results revealed that the urban-land-expansion intensity of the Pearl-River-Delta urban agglomerations exhibit a downward trend, while cities exhibited a trend of developing more coordinately from 2000 to 2015. Physical factors determined the direction and scale of urban development, and the urban land expansion in the Pearl-River-Delta urban agglomeration is mainly distributed in plain areas that have an elevation below 120 m and a slope less than 5°. Socioeconomic factors have a greater influence on the expansion of urban land, and their effects have changed over time. Population growth and economic development has played a significant role in the expansion of urban land before 2005. Subsequently, the factor of GDP and distance to the core cities of Guangzhou and Shenzhen controlled the expansion to the greatest extent. The impacts of various factors tended to become balanced during 2010–2015. The majority of the factors enhanced each other via their interactions, and the distance to the rivers always exhibited a greater enhancement when there was interaction with other factors. The spatial and temporal analysis of the urban expansion and the mechanism of the Pearl River Delta urban agglomeration could provide useful information for coastal urban planning. This study also offers new knowledge regarding the interactions between different drivers of urban land expansion.

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46

Sum, Ngai-Ling. "A cultural political economy of transnational knowledge brands." Discourse and Socio-Political Transformations in Contemporary China 9, no. 4 (2010): 546–73. http://dx.doi.org/10.1075/jlp.9.4.05sum.

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This paper adopts a “cultural political economy” (CPE) approach to examine the production of hegemony and related hegemonic struggles during the socio-spatial changes occurring in the Pearl River Delta. Drawing from the case of Hong Kong/Pearl River Delta, economic restructuring has given rise to the “hollowing out” debate. In face of this debate, two knowledge brands, the Harvard-Porter’s “competitive advantage” (1985) and MIT-Berger-Lester’s “industrial performance” models, have been stabilized as competing modes of developmentality (development governmentality) and have operated as paper-based economic panopticons to order/manage, at a distance, the organization of Hong Kong’s/Pearl River Delta’s space, policy, and, ultimately, the conduct of its population. These modes of developmentalities have met resistance from other forces in other spaces and with other interests, including from below. Nonetheless the two main power blocs are engaging in inter-bloc negotiations in the light of such resistance and are creating a hybrid strategy under the dominance of the service bloc.

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Liao, Xiaomei, Yan Du, Tianyu Wang, et al. "High-Frequency Variations in Pearl River Plume Observed by Soil Moisture Active Passive Sea Surface Salinity." Remote Sensing 12, no. 3 (2020): 563. http://dx.doi.org/10.3390/rs12030563.

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River plumes play an important role in the cross-margin transport of phytoplankton and nutrients, which have profound impacts on coastal ecosystems. Using recently available Soil Moisture Active Passive (SMAP) sea surface salinity (SSS) data and high-resolution ocean color products, this study investigated summertime high-frequency variations in the Pearl River plume of China and its biological response. The SMAP SSS captures the intraseasonal oscillations in the offshore transport of the Pearl River plume well, which has distinct 30–60 day variations from mid-May to late September. The offshore transport of freshwater varies concurrently with southwesterly wind anomalies and is roughly in phase with the Madden–Julian Oscillation (MJO) index in phases 1–5, thus implying that the MJO exerts a significant influence. During MJO phases 1–2, the southwest wind anomalies in the northeastern South China Sea (SCS) enhanced cross-shore Ekman transport, while the northeast wind anomalies during MJO phases 3–5 favored the subsequent southwestward transport of the plume. The high chlorophyll-a concentration coincided well with the low-salinity water variations, emphasizing the important role of the offshore transport of the Pearl River plume in sustaining biological production over the oligotrophic northern SCS. The strong offshore transport of the plume in June 2015 clearly revealed that the proximity of a cyclonic eddy plays a role in the plume’s dispersal pathway. In addition, heavy rainfall related to the landfall of tropical cyclones in the Pearl River Estuary region contributed to the episodic offshore transport of the plume.

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Spiers, James M., C. L. Gupton, and Arlen D. Draper. "'JUBILEE', 'MAGNOLIA', AND 'PEARL RIVER' SOUTHERN HIGHBUSH BLUEBERRIES." Acta Horticulturae, no. 446 (August 1997): 155–58. http://dx.doi.org/10.17660/actahortic.1997.446.22.

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McGormley, Jonathan, Richard Lindenberg, Brian Santosuosso, and Nick Altobelli. "Fatigue Evaluation and Retrofit of Pearl River Bridge." IABSE Symposium Report 99, no. 11 (2013): 452–53. http://dx.doi.org/10.2749/222137813806520983.

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Zhang, Wei, Yang Xu, A. J. F. Hoitink, et al. "Morphological change in the Pearl River Delta, China." Marine Geology 363 (May 2015): 202–19. http://dx.doi.org/10.1016/j.margeo.2015.02.012.

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Journal articles on the topic 'Pearl River'

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