Browsing UTSA Faculty and Staff Works by Author "Xie, Hongjie"
Now showing items 1-20 of 28
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A New Digital Lake Bathymetry Model Using the Step-Wise Water Recession Method to Generate 3D Lake Bathymetric Maps Based on DEMs
Zhu, Siyu; Liu, Baojian; Wan, Wei; Xie, Hongjie; Fang, Yu; Chen, Xi; Li, Huan; Fang, Weizhen; Zhang, Guoqing; Tao, Mingwei; Hong, Yang (5/31/2019)The availability of lake bathymetry maps is imperative for estimating lake water volumes and their variability, which is a sensitive indicator of climate. It is difficult, if not impossible, to obtain bathymetric measurements ... -
A Review on Applications of Remote Sensing and Geographic Information Systems (GIS) in Water Resources and Flood Risk Management
Wang, Xianwei; Xie, Hongjie (5/7/2018)Water is one of the most critical natural resources that maintain the ecosystem and support people's daily life. Pressures on water resources and disaster management are rising primarily due to the unequal spatial and ... -
An Evaluation of Satellite Estimates of Solar Surface Irradiance Using Ground Observations in San Antonio, Texas, USA
Xia, Shuang; Mestas-Nuñez, Alberto M.; Xie, Hongjie; Vega, Rolando (12/7/2017)Estimates of solar irradiance at the earth's surface from satellite observations are useful for planning both the deployment of distributed photovoltaic systems and their integration into electricity grids. In order to use ... -
An On-Demand Service for Managing and Analyzing Arctic Sea Ice High Spatial Resolution Imagery
Sha, Dexuan; Miao, Xin; Xu, Mengchao; Yang, Chaowei; Xie, Hongjie; Mestas-Nuñez, Alberto M.; Li, Yun; Liu, Qian; Yang, Jingchao (4/17/2020)Sea ice acts as both an indicator and an amplifier of climate change. High spatial resolution (HSR) imagery is an important data source in Arctic sea ice research for extracting sea ice physical parameters, and ... -
Assessing Scale Dependence on Local Sea Level Retrievals from Laser Altimetry Data over Sea Ice
Tian, Liuxi; Xie, Hongjie; Ackley, Stephen F.; Mestas-Nuñez, Alberto M. (11/13/2020)The measurement of sea ice elevation above sea level or the "freeboard" depends upon an accurate retrieval of the local sea level. The local sea level has been previously retrieved from altimetry data alone by the lowest ... -
C3 Vegetation Mapping and CO2 Fertilization Effect in the Arid Lower Heihe River Basin, Northwestern China
Bi, Yunbo; Xie, Hongjie (12/4/2015)In arid regions, C3 vegetation is assumed to be more sensitive to precipitation and CO2 fertilization than C4 vegetation. In this study, normalized difference vegetation index (NDVI) is used to examine vegetation growth ... -
Characterizing Variability of Solar Irradiance in San Antonio, Texas Using Satellite Observations of Cloudiness
Xia, Shuang; Mestas-Nuñez, Alberto M.; Xie, Hongjie; Tang, Jiakui; Vega, Rolando (12/12/2018)Since the main attenuation of solar irradiance reaching the earth's surface is due to clouds, it has been hypothesized that global horizontal irradiance attenuation and its temporal variability at a given location could ... -
Correction: Zhu, S., et al. A New Digital Lake Bathymetry Model Using the Step-Wise Water Recession Method to Generate 3D Lake Bathymetric Maps Based on DEMs. Water 2019, 11, 1151
Zhu, Siyu; Liu, Baojian; Wan, Wei; Xie, Hongjie; Fang, Yu; Chen, Xi; Li, Huan; Fang, Weizhen; Zhang, Guoqing; Tao, Mingwei; Hong, Yang (11/19/2019)In the published article [1], the authors realized some errors in the affiliation and email address of Yang Hong, and thus wish to make the following revisions: [...] -
Developing the Remote Sensing-Gash Analytical Model for Estimating Vegetation Rainfall Interception at Very High Resolution: A Case Study in the Heihe River Basin
Cui, Yaokui; Zhao, Peng; Yan, Binyan; Xie, Hongjie; Yu, Pengtao; Wan, Wei; Fan, Wenjie; Hong, Yang (6/27/2017)Accurately quantifying the vegetation rainfall interception at a high resolution is critical for rainfall-runoff modeling and flood forecasting, and is also essential for understanding its further impact on local, regional, ... -
Editorial for Special Issue "Remote Sensing Water Cycle: Theory, Sensors, Data, and Applications"
Wan, Wei; Xie, Hongjie; Hasan, Emad; Hong, Yang (5/22/2019)Global water cycle dynamics involve the exchange of water and energy matter among the atmosphere, hydrosphere, geosphere, cryosphere, and biosphere. Remote sensing provides a unique advantage of observing and acquiring ... -
Estimation of Alpine Grassland Forage Nitrogen Coupled with Hyperspectral Characteristics during Different Growth Periods on the Tibetan Plateau
Gao, Jinlong; Liang, Tiangang; Yin, Jianpeng; Ge, Jing; Feng, Qisheng; Wu, Caixia; Hou, Mengjing; Liu, Jie; Xie, Hongjie (9/6/2019)The applicability of hyperspectral remote sensing models for forage nitrogen (N) retrieval during different growth periods is limited. This study aims to develop a multivariate model feasible for estimating the forage N ... -
Estimation of Snow Depth over the Qinghai-Tibetan Plateau Based on AMSR-E and MODIS Data
Dai, Liyun; Che, Tao; Xie, Hongjie; Wu, Xuejiao (12/8/2018)Snow cover over the Qinghai-Tibetan Plateau (QTP) plays an important role in climate, hydrological, and ecological systems. Currently, passive microwave remote sensing is the most efficient way to monitor snow depth on ... -
Evaluation of Remote Sensing Inversion Error for the Above-Ground Biomass of Alpine Meadow Grassland Based on Multi-Source Satellite Data
Meng, Baoping; Ge, Jing; Liang, Tiangang; Yang, Shuxia; Gao, Jinglong; Feng, Qisheng; Cui, Xia; Huang, Xiaodong; Xie, Hongjie (4/16/2017)It is not yet clear whether there is any difference in using remote sensing data of different spatial resolutions and filtering methods to improve the above-ground biomass (AGB) estimation accuracy of alpine meadow grassland. ... -
Flash Flood Risk Analysis Based on Machine Learning Techniques in the Yunnan Province, China
Ma, Meihong; Liu, Changjun; Zhao, Gang; Xie, Hongjie; Jia, Pengfei; Wang, Dacheng; Wang, Huixiao; Hong, Yang (1/17/2019)Flash flood, one of the most devastating weather-related hazards in the world, has become more and more frequent in past decades. For the purpose of flood mitigation, it is necessary to understand the distribution of flash ... -
Ice Production in Ross Ice Shelf Polynyas during 2017–2018 from Sentinel–1 SAR Images
Dai, Liyun; Xie, Hongjie; Ackley, Stephen F.; Mestas-Nuñez, Alberto M. (5/7/2020)High sea ice production (SIP) generates high-salinity water, thus, influencing the global thermohaline circulation. Estimation from passive microwave data and heat flux models have indicated that the Ross Ice Shelf polynya ... -
Imaging Floods and Glacier Geohazards with Remote Sensing
Cigna, Francesca; Xie, Hongjie (11/26/2020)Geohazards associated with the dynamics of the liquid and solid water of the Earth's hydrosphere, such as floods and glacial processes, may pose significant risks to populations, activities and properties [...] -
LiDAR-Based Solar Mapping for Distributed Solar Plant Design and Grid Integration in San Antonio, Texas
Le, Tuan B.; Kholdi, Danial; Xie, Hongjie; Dong, Bing; Vega, Rolando E. (3/16/2016)This study represents advancements in the state-of-the-art of the solar energy industry by leveraging LiDAR-based building characterization for city-wide, distributed solar photovoltaics, solar maps, highlighting the ... -
Modeling of Alpine Grassland Cover Based on Unmanned Aerial Vehicle Technology and Multi-Factor Methods: A Case Study in the East of Tibetan Plateau, China
Meng, Baoping; Gao, Jinlong; Liang, Tiangang; Cui, Xia; Ge, Jing; Yin, Jianpeng; Feng, Qisheng; Xie, Hongjie (2/21/2018)Grassland cover and its temporal changes are key parameters in the estimation and monitoring of ecosystems and their functions, especially via remote sensing. However, the most suitable model for estimating grassland cover ... -
Quantifying Snow Albedo Radiative Forcing and Its Feedback during 2003–2016
Xiao, Lin; Che, Tao; Chen, Linling; Xie, Hongjie; Dai, Liyun (8/25/2017)Snow albedo feedback is one of the most crucial feedback processes that control equilibrium climate sensitivity, which is a central parameter for better prediction of future climate change. However, persistent large ... -
Satellite-based Cloudiness and Solar Energy Potential in Texas and Surrounding Regions
Xia, Shuang; Mestas-Nuñez, Alberto M.; Xie, Hongjie; Vega, Rolando (5/11/2019)Global horizontal irradiance (i.e., shortwave downward solar radiation received by a horizontal surface on the ground) is an important geophysical variable for climate and energy research. Since solar radiation is attenuated ...