Spatial evolution of URNCL and response of ecological security: a case study on Foshan City

Xiao, Huining; Wang, Mengying; Sheng, Shuo

doi:10.1080/24749508.2017.1361150

Cited by 21 publications

(14 citation statements)

References 5 publications

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“…For urban communities, how to describe hydrological cycle, artificial water and drainage process in a more detailed way? It is still necessary to combine prototype observations with the information provided by the physical model in a mathematical model, and develop the tools of urban water cycle research, to provide a powerful support tool for the study of urban water cycle [20][21][22][23][24][25].…”

Section: Methodsmentioning

confidence: 99%

Characteristic and pattern of urban water cycle: theory

Wei¹,

Wang²,

Wang³

2018

Desalination and Water Treatment

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a b s t r a c tUrban water cycle is one of the foremost contemporary research topics in hydrological research, and it forms the foundation of urban water resources management. This study serves to provide better analysis and understanding of the changes in urban water cycle such as number of factors, complexity of processes, magnitude of impact, etc. It serves to sum up the integration of nature and anthropogenic water cycle, in the form of a bi-modal urban water cycle model. The work focuses on the difference and compatibility of scales and methodology in urban hydrological processes, in order to highlight the gaps in urban water cycle research. This includes developing a unique model to simulate the characteristics and evolution of processes in urban areas, with the intention of supporting future urban water resources management.

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Section: Methodsmentioning

confidence: 99%

Characteristic and pattern of urban water cycle: theory

Wei¹,

Wang²,

Wang³

2018

Desalination and Water Treatment

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“…There was little change in moisture observed with increasing height for all compactions, indicating little variation in the initial moisture content. However, the moisture contents increased slightly near the temperature dividing line (Xiao et al, 2017). As a result, a portion of the observed water migration was in response to the temperature gradient.…”

Section: Change In Moisture After Freezingmentioning

confidence: 98%

Characteristics and Laboratory Freeze–thaw Test of Saline Soil in West Jilin, China

Bao¹

2018

Appl. Ecol. Env. Res.

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Abstract. For the purpose of investigating the characteristic and material composition of saline soil in western Jilin, China the saline soil distribution area of Da'an in west Jilin Province was sampled during a site investigation, after which the fundamental properties of the soil were investigated in the laboratory. The soluble salt ranged from 0.28% to 0.60%, decreasing with depth from 0 to 40 cm blow the surface. Conversely, the moisture content increased with increasing depth, but showed little change beneath 40 cm. An indoor freeze-thaw simulation test revealed that the moisture migrated under the temperature gradient, while the salinity migrated upwards under the combined action of the temperature gradient and concentration gradient, with the optimum degree of compaction for salinity migration being 90%. Following freezing, the inside structure became looser, and this phenomenon was more obvious when the temperature was lower. The research provided the basis for prevention of the secondary salinization and frost heaving the disease of saline soil in western Jilin province.

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“…Loess soils are widely distributed in arid and semi-arid regions around the world, including countries such as China, Russia, and the United States [1][2][3][4]. Loess soils are typically a kind of clayey silt with an open structure, generally in a state of unsaturated condition and collapsible upon wetting.…”

Section: Introductionmentioning

confidence: 99%

Influence of irrigation method on the infiltration in loess: field study in the Loess Plateau

Wang¹,

Li²,

Ma³

et al. 2018

Desalination and Water Treatment

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a b s t r a c tIt is well known that loess soils are collapsible upon wetting, and subsidence or cracking or failure of structures induced by loess collapsing poses serious threat to human being. Wetting is the most important prerequisite for loess collapsing; however, how the irrigation water, both man-made and natural, infiltrates and flows in loess is not well known. For this reason, a field soaking test simulating flooding irrigation method and a rainfall infiltration test simulating dripping irrigation method were conducted in instrumented sites in the Loess Plateau. This paper presents the results from soil water meters to reveal the infiltration process in loess based on the soil water content variations. The results highlight the significance of the preferential flows when a large amount of water is irrigated to the soils (flooding irrigation). Owning to the presence of preferential paths, the water infiltrates from both shallower and greater depths to the intermediate depths, as a result, bell-shaped zone of wetting and saturated zone are developed in the soils. However, the influence of environmental factors is of dominance when the amount of irrigation water is very small (precipitation). The rain water, pore water, and water vapor transform from one to another depending on the rates of precipitation and evaporation as well as soil properties. For this reason, the maximum depth of the wetting front measured in a drought year was less than 3 m. The test results provide valuable information for interpreting the infiltration of water in loess with respect to varying irrigation method, soil heterogeneity, and environmental factors. However, such information is required for modeling the wetting-induced collapse of loess and analyzing the stability of structures built on loess.

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Spatial evolution of URNCL and response of ecological security: a case study on Foshan City

Cited by 21 publications

References 5 publications

Characteristic and pattern of urban water cycle: theory

Characteristic and pattern of urban water cycle: theory

Characteristics and Laboratory Freeze–thaw Test of Saline Soil in West Jilin, China

Influence of irrigation method on the infiltration in loess: field study in the Loess Plateau

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