Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China

Han, Hao; Hou, Jingming; Jiang, Rengui; Gong, Jiahui; Bai, Guohua; Kang, Yongde; Qi, Wang; Li, Yuan; Li, Bingyao

doi:10.2166/wcc.2021.048

Cited by 14 publications

(5 citation statements)

References 55 publications

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“…Xi’an experiences high rainfall in summer and autumn, with a long rainy period and high air humidity [ 21 ]. The structure of the ear canal is relatively closed and a moist environment is beneficial for the growth of microorganisms.…”

Section: Discussionmentioning

confidence: 99%

The epidemiology of canine ear diseases in Northwest China: Analysis of data on 221 dogs from 2012 to 2016

Li,

et al. 2023

Vet World

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Background and Aim: Ear disease is relatively important in veterinary medicine as it significantly affects the quality of life of pets. Two hundred and twenty-one cases of canine ear diseases were collected and collated at the Xi'an Teaching Hospital of Northwest A&F University from 2012 to 2016. An epidemiological analysis was conducted to evaluate the prevalence and causes of various ear diseases in various breeds of dogs in Xi'an. Materials and Methods: Data were collected and statistically analyzed by reviewing previous cases and obtaining medical history data and laboratory results. This study included the following experiments: systematic examination of the animals' skin, auricular skin scraping test, ear canal endoscopy, and examination of ear canal secretion. Results: The top three dog breeds most commonly afflicted with ear diseases in Xi'an were Toy poodles , Cocker Spaniels, and Golden Retrievers, accounting for 18.5%, 10.4%, and 9.5% of the total cases, respectively. The prevalence was the highest in August and September, with male dogs having a higher prevalence rate than female dogs. Common ear diseases were categorized as otitis externa, otitis media, otitis interna, or ear hematoma. Conclusion: This study determined the prevalence of external otitis, ear hematoma, otitis media, and inner otitis in dogs in the Xi'an area. These results can help expand the current understanding of the development and epidemiology of canine ear diseases and provide a reference for clinical diagnosis, treatment, and prevention. Keywords: dog, epidemiology, otitis externa, Northwest of China.

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Section: Discussionmentioning

confidence: 99%

The epidemiology of canine ear diseases in Northwest China: Analysis of data on 221 dogs from 2012 to 2016

Li,

et al. 2023

Vet World

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“…Statistics show that the overall precipitation trend in Xi'an has been decreasing in recent years, with a rate of decrease of 6.05 mm/10a. However, the frequency of extreme rainfall events has been increasing yearly, with an inclination of 0.28 (mm/d)/10a [23]. It has shown a more pronounced increase in the central city than in the surrounding districts and counties.…”

Section: Special Climatic and Construction Conditionsmentioning

confidence: 99%

Research on the Impact of Heavy Rainfall Flooding on Urban Traffic Network Based on Road Topology: A Case Study of Xi’an City, China

Liu

Yang

Ren

2023

Land

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In recent years, the frequent occurrence of extreme emergencies represented by heavy rainfall has posed a significant impact on urban transportation networks and caused great inconvenience to people’s production and life. This paper examines the impact of heavy rainfall on the urban transportation network in Xi’an’s main urban area, models the map of urban road network in the main urban area of Xi’an by applying complex network theory, quantifies and analyzes the topological and geographic structural characteristics of the affected sections (interrupted by heavy rainfall) due to heavy rainfall, as well as the impact of heavy rainfall on the functional indexes of the road network such as access efficiency and accessibility, and, finally, analyzes its formation causes and proposes targeted management countermeasures. The findings of this study serve as a valuable reference for enhancing urban traffic emergency management capabilities and fostering sustainable urban development.

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“…The slope of the temporal trends (annual average and frequency of extremes) is analyzed using linear regression (Han et al, 2021). The least-square method in the traditional linear regression provides the trend in the time series, e.g., annual average precipitation, number of days above 95th percentile, and number of days above 99th percentile.…”

Section: Trend Magnitudementioning

confidence: 99%

Investigating Temporal and Spatial Precipitation Patterns in the Southern Mid-Atlantic United States

2022

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The investigation of regional vulnerability to extreme hydroclimatic events (e.g., floods and hurricanes) is quite challenging due to its dependence on reliable precipitation estimates. Better understanding of past precipitation trends is crucial to examine changing precipitation extremes, optimize future water demands, stormwater infrastructure, extreme event measures, irrigation management, etc., especially if combined with future climate and population projections. The objective of the study is to investigate the spatial-temporal variability of average and extreme precipitation at a sub-regional scale, specifically in the Southern Mid-Atlantic United States, a region characterized by diverse topography and is among the fastest-growing areas in North America. Particularly, this work investigates past precipitation trends and patterns using the North American Land Data Assimilation System, Version 2 (NLDAS-2, 12 km/1 h resolution) reanalysis dataset during 1980–2018. Both parametric (linear regression) and non-parametric (e.g., Theil-Sen) robust statistical tools are employed in the study to analyze trend magnitudes, which are tested for statistical significance using the Mann-Kendall test. Standard precipitation indices from ETCCDI are also used to characterize trends in the relative contribution of extreme events to precipitation in the area. In the region an increasing trend (4.3 mm/year) is identified in annual average precipitation with ~34% of the domain showing a significant increase (at the 0.1 significance level) of +3 to +5 mm/year. Seasonal and sub-regional trends are also investigated, with the most pronounced increasing trends identified during summers along the Virginia and Maryland border. The study also finds a statistically significant positive trend (at a 0.05 significance level) in the annual maximum precipitation. Furthermore, the number of daily extremes (daily total precipitation higher than the 95th and 99th percentiles) also depicts statistically significant increases, indicating the increased frequency of extreme precipitation events. Investigations into the proportion of annual precipitation occurring on wet days and extremely wet days (95th and 99th percentile) also indicate a significant increase in their relative contribution. The findings of this study have the potential to improve local-scale decision-making in terms of river basin management, flood control, irrigation scheme scheduling, and stormwater infrastructure planning to address urban resilience to hydrometeorological hazards.

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Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China

Cited by 14 publications

References 55 publications

The epidemiology of canine ear diseases in Northwest China: Analysis of data on 221 dogs from 2012 to 2016

The epidemiology of canine ear diseases in Northwest China: Analysis of data on 221 dogs from 2012 to 2016

Research on the Impact of Heavy Rainfall Flooding on Urban Traffic Network Based on Road Topology: A Case Study of Xi’an City, China

Investigating Temporal and Spatial Precipitation Patterns in the Southern Mid-Atlantic United States

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