Liangyan Yang

ORCID: 0000-0003-3812-604X
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About
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Research Areas
  • Remote Sensing and Land Use
  • Remote Sensing in Agriculture
  • Land Use and Ecosystem Services
  • Environmental Changes in China
  • Plant Water Relations and Carbon Dynamics
  • Hydrology and Watershed Management Studies
  • Urban Heat Island Mitigation
  • Soil erosion and sediment transport
  • Climate variability and models
  • Plant Ecology and Soil Science
  • Water resources management and optimization
  • Flood Risk Assessment and Management
  • Urban Green Space and Health
  • Landslides and related hazards
  • Environmental and Agricultural Sciences
  • Tree Root and Stability Studies
  • Ecology and Vegetation Dynamics Studies
  • Climate change and permafrost
  • Climate Change and Health Impacts
  • Water Resources and Management
  • Remote-Sensing Image Classification
  • Peatlands and Wetlands Ecology
  • Soil and Land Suitability Analysis
  • Environmental Impact and Sustainability
  • Retinal and Macular Surgery

Shaanxi Provincial Land Engineering Construction Group
2020-2024

China Land Surveying and Planning Institute
2021-2024

Ministry of Natural Resources
2020-2024

Land Consolidation and Rehabilitation Center
2021-2024

Xi'an Jiaotong University
2021-2024

Chang'an University
2018

As an important part of the terrestrial ecosystem, vegetation is commonly used as indicator to evaluate climate change and ecological restoration efforts. In China's farming-pastoral areas, Mu Us Desert a typical area utilizing desertification control methods where cover has significantly changed in recent years. It assess how afforestation affect activity dynamic this region. This study aims investigate relationship between by using normalized difference index (NDVI), find cause performing...

10.1016/j.ecolind.2021.108020 article EN cc-by-nc-nd Ecological Indicators 2021-07-26

Exploring land use/cover (LULC) change is essential for the sustainable development of ecologically fragile areas. The main objective this study was to clarify characteristics and differences in spatiotemporal changes LULC on Loess Plateau (LP) based transfer matrix use dynamics quantitatively describe impact natural factors using a geodetector. results indicated that overall LP characterized by decrease area cropland, grassland, bare land, an increase woodland built-up land. This trend...

10.1038/s41598-024-73945-0 article EN cc-by-nc-nd Scientific Reports 2024-10-05

This paper explores the relationship between normalized vegetation index (NDVI) response to precipitation and temperature conditions by analyzing spatial temporal variation of cover in Mu Us Desert during 2000-2019. MODIS indices are designed provide consistent comparisons conditions. Maximum Value Composites (MVC) is an internationally used statistical method for NDVI data. Based on remote sensing data, sandy land from 2000 2019 was analyzed using linear regression slope method. In...

10.2166/wst.2023.212 article EN cc-by Water Science & Technology 2023-07-04

With the intensification of global climate change and environmental degradation, goals carbon peaking neutrality have become crucial strategies for promoting sustainable development in various countries. However, most studies on ecological environment quality (EEQ) focus urban areas, with limited attention to county-level analyses, particularly regarding complex interactions between climate, topography, human activities. This study aims address this gap by investigating spatiotemporal...

10.3389/fenvs.2025.1513325 article EN cc-by Frontiers in Environmental Science 2025-01-20

Using remote sensing monitoring data of China's land use/land cover in 1980, 2000, and 2020, this study explores the change patterns driving forces use types Yan'an City through transfer matrix status index. The results show that main are grassland, cultivated land, unused land. From 1980 to absolute changes area ranked as follows: > grassland construction forest water area. first increased then decreased, while decreased forest-grassland increased, which is closely related national...

10.54691/dyet9651 article EN Frontiers in Sustainable Development 2025-05-24

<title>Abstract</title> Exploring LULC change is essential for the sustainable development of ecologically fragile areas. This study based on transfer matrix and land use dynamicity, combined with data meteorological LP from 1980 to 2020, explore spatio-temporal characteristics its response climate in LP. The results indicated that overall was characterized by a decrease area cropland, grassland bare land, an increase woodland build-up trend had obvious stage around 2000. 2000 2020 more...

10.21203/rs.3.rs-4230644/v1 preprint EN cc-by Research Square (Research Square) 2024-04-18

Abstract Normalized difference vegetation index (NDVI) and land surface temperature (LST) are important indicators of ecological changes, their spatial temporal variations coupling can provide a theoretical basis for the sustainable development environment. Based on MOD13A1 MOD11A2 datasets, distribution characteristics NDVI LST from 2000 to 2020 were analyzed, trend change slope method model used calculate significant changes. Finally, was degree between LST. The study shows that: (1) From...

10.1515/geo-2022-0691 article EN cc-by-nc-nd Open Geosciences 2024-01-01

Evapotranspiration plays a crucial role in the surface hydrothermal balance. On regional scale, especially blown-sand areas, an accurate estimate of evapotranspiration has important guiding significance for rational allocation water resources and drought monitoring. The objective study is to region Ordos Basin based on Surface Energy Balance Algorithm Land (SEBAL) model using six phases Landsat 8 remote sensing images during 2015–2016 corresponding meteorological observational data, analyze...

10.1080/01431161.2018.1508919 article EN International Journal of Remote Sensing 2018-10-22

Based on the MOD16A3GF data, spatial regression analysis was conducted to explore trends of annual change AET and characteristics its distribution in Mu Us Sandy Land between 2001 2020. Combined meteorological data NDVI analyze effects by trend correlation coefficient. The results showed that (1) exhibited significant regional differences Land, with an overall low northwest high southeast pattern; (2) a rapid upward from 2020, average rate 5.68 mm·a-1; (3) coefficient precipitation 0.74,...

10.2166/wst.2023.226 article EN cc-by Water Science & Technology 2023-07-26

Evapotranspiration (ET) plays a crucial role in hydrological and energy cycles, as well the assessments of water resources irrigation demands. On regional scale, particularly agro-pastoral ecotone, clarification distribution surface ET its influencing factors is critical for rational use resources, restoration ecological environment, protection sources. The SEBAL model was used to invert based on Landsat8 images ecotone northwest China. results were indirectly verified by monitoring data...

10.1371/journal.pone.0265138 article EN cc-by PLoS ONE 2022-03-15

Abstract The ecological environment in arid areas of Northwest China has undergone considerable changes under the combined effects climate change and human factors. Therefore, exploring spatial temporal evolution quality is great significance for protection management China. This study adopted Yuyang district as area. Landsat Thematic Mapper/Operational Land Imager images from 1993 to 2018 were selected data source retrieval important surface indicators construction remote sensing distance...

10.1515/geo-2020-0328 article EN Open Geosciences 2021-01-01

Abstract Sri Lanka is an important hub connecting Asia-Africa-Europe maritime routes. It receives abundant but uneven spatiotemporal distribution of rainfall and has evident seasonal water shortages. Monitoring area changes in inland lakes reservoirs plays role guiding the development utilisation resources. In this study, a rapid surface extraction model based on Google Earth Engine remote sensing cloud computing platform was constructed. By evaluating optimal spectral index method,...

10.1038/s41598-021-04754-y article EN cc-by Scientific Reports 2022-01-14

Grasslands play an irreplaceable role in maintaining carbon balance and stabilizing the entire Earth’s ecosystem. Although grasslands Inner Mongolia are sensitive vulnerable to climate change, a generalized effect of change on is still unavailable. In this study, we analyzed effects annual mean precipitation temperature normalized difference vegetation index from 1982 2010 Plateau. Our results indicated that was mostly affected by precipitation, followed temperature. Spatially, had greater...

10.3390/app11188766 article EN cc-by Applied Sciences 2021-09-21

The understanding of land-use and land-cover change (LUCC) is crucial for the study global climate terrestrial ecological environment. Sandy land an important component ecosystem. This applied transition matrix trajectory analysis to examine spatiotemporal characteristics LUCC from 1980 2018 in Mu Us Land, China. influences soil, meteorological conditions, national policy on this region were also investigated. results classification five remote sensing images captured between showed that...

10.1080/15324982.2021.1933648 article EN Arid Land Research and Management 2021-06-08

The technology of slope vegetation system stability enhancement is an important part the comprehensive ecological security improvement in small watersheds area Loess Plateau. results soil erosion sub-basin are used to give evaluation effectiveness gully restoration project. Soil quantification distribution Sheep Sap Gully Plateau hilly was simulated and explored by combining modified universal loss equation RUSLE model with GIS RS spatial information technology. quantitative values LS factor...

10.2166/ws.2022.256 article EN cc-by Water Science & Technology Water Supply 2022-07-01

Water-saving scientifically proved measures are crucial to reduce the use of decreasing fresh water resources. In this study, we investigate current situation residents' domestic use, analyze water-saving measures, consciousness and its influencing factors. We performed a questionnaire survey data obtained by relevant supply departments, paper used SPSS 19.0 Excel 2020 software conduct statistical analysis data. Our results show that: (1) overall, consumption urban residents in central...

10.2166/wst.2022.116 article EN cc-by-nc-nd Water Science & Technology 2022-04-06

The Loess Plateau is located in the middle reaches of Yellow River, with serious soil erosion and important ecological status.Scientific assessment environment quality premise to realize sustainable development regional ecology, which great significance improvement Plateau.Based on Landsat series data, this study constructed remote sensing index (RSEI) evaluated Plateau.The results show that: (1) From 2006 2020, average RSEI experienced three stages degradation-slow improvement-rapid...

10.15244/pjoes/170764 article EN Polish Journal of Environmental Studies 2023-10-27

Based on the daily data of temperature and precipitation from 7 meteorological stations in Maowusu Sandy Land 2000 to 2020, linear regression analysis was used clarify characteristics changes study area. The results show that Mu Us sandy land showed an overall upward trend with a growth rate 0.09 ℃/(10a) average 9.26 ℃; shows fluctuating trend, 4.06mm/a 373.75mm. Since 21st century, there has been discrepancy between research area global warming. possible reason for this is implementation...

10.54691/fse.v3i11.5708 article EN cc-by-nc Frontiers in Science and Engineering 2023-11-21

This study conducted an in-depth analysis of the landslide problem in loess hill and gully area northern Shaanxi Province, selecting site Quchaigou, Ganquan County, Yan’an City, as object to assess stability slopes under conditions different plant root densities soil moisture contents through field investigation, physical mechanics experiments numerical simulation GeoStudio model. Periploca sepium, a dominant species community, was selected simulate slope soils water contents. The showed...

10.3390/w16243558 article EN Water 2024-12-10

Abstract Comprehensive management of the ecological environment and sustainable development, such as gully control land consolidation (GCLC) project, may affect surface vegetation. The normalized difference vegetation index (NDVI) is a sensitive indicator dynamics; however, an in-depth study that continually monitors spatial temporal variation regional before after implementation GCLC project still scarce. To address this issue, we analyzed variations Landsat reflectance-derived NDVI data in...

10.1515/geo-2022-0392 article EN cc-by-nc-nd Open Geosciences 2022-01-01

&lt;abstract&gt; &lt;p&gt;This study aimed to assess the impact of land consolidation projects and climate change on changes in vegetation Loess Plateau during 2012–2021. The also explored impacts human activities ecological quality this period. spatial temporal normalized difference combined meteorological monitoring data, project index (NDVI) data that was used create dataset spanning from discussed assessed effectiveness project, revealing following results: 1) A significant increase...

10.3934/mbe.2024168 article EN cc-by Mathematical Biosciences & Engineering 2024-01-01

This study analyzed the spatial and temporal characteristics of surface temperature in Uttarakhand Banner, explored correlation between land use types temperature. The results show that Urumqi Banner is greatly influenced by change types, difference different obvious; trend from gradual warming global climate change, which mainly due to human activities.

10.62051/ijnres.v2n2.15 article EN cc-by-nc International Journal of Natural Resources and Environmental Studies 2024-04-29

Abstract In order to find out the changing trend of temperature and extreme weather in Zhengzhou under background rising global temperature. This study analyzes annual mean seasonal average from 1990 2017 based on meteorological data. The index for 28 years was extracted. results show that 2017, air shows a significant upward trend, its rate is higher than warming rate. There are differences four seasons Zhengzhou, with largest change spring, followed by summer autumn, weakest winter. has...

10.1088/1742-6596/1549/2/022048 article EN Journal of Physics Conference Series 2020-06-01
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