Songhao Shang
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View article: Assessing the discrepancies and uncertainties of regional shared and pixel-specific trapezoidal feature spaces using a Priestley-Taylor-based evapotranspiration model
Assessing the discrepancies and uncertainties of regional shared and pixel-specific trapezoidal feature spaces using a Priestley-Taylor-based evapotranspiration model Open
The vegetation index–land surface temperature (VI–LST) feature space method is widely used for regional evapotranspiration (ET) estimation, linking vegetation cover with the temperature–ET response while balancing model complexity and effi…
View article: Developing robust Vegetation Health Indices by optimizing the weights for vegetation and temperature condition indices using principal component analysis
Developing robust Vegetation Health Indices by optimizing the weights for vegetation and temperature condition indices using principal component analysis Open
Study region: Punjab Province and different agro-ecological zones of Pakistan. Study focus: This study aimed to develop three robust Vegetation Health Indices (VHIs) to validate the assumption that weights assigned to Vegetation Condition …
View article: A 3.5-fold increase in the synchrony of extreme precipitation and temperature events across China from 1930 to 2022
A 3.5-fold increase in the synchrony of extreme precipitation and temperature events across China from 1930 to 2022 Open
Global warming has led to an increasing frequency of extreme climate events; however, existing studies have largely focused on individual extremes or selected pairs occurring at specific locations over relatively short time frames, with li…
View article: Synergistic evolution of soil microaggregates biogeochemical processes driven by elevation gradients in Tongbai Mountain
Synergistic evolution of soil microaggregates biogeochemical processes driven by elevation gradients in Tongbai Mountain Open
The altitudinal gradient in mountainous areas triggers significant changes in landscape, climate, and vegetation, which in turn affect the vertical differentiation of soil type and their properties. Located in the transitional zone between…
View article: Discrepancies and Uncertainties in the Application of the Fc-LST Theoretical Trapezoid Framework at Pixel and Areal Scales Using a Priestley-Taylor based Evapotranspiration Model
Discrepancies and Uncertainties in the Application of the Fc-LST Theoretical Trapezoid Framework at Pixel and Areal Scales Using a Priestley-Taylor based Evapotranspiration Model Open
Evapotranspiration (ET) is the primary pathway for dissipating terrestrial water resources, and a key process in regulating surface temperature. The Ts-VI feature space method is an important evapotranspiration simulation approach, reflect…
View article: An improved optical trapezoid model to identify irrigation water ponds in the arid irrigation district using Google Earth Engine
An improved optical trapezoid model to identify irrigation water ponds in the arid irrigation district using Google Earth Engine Open
In arid regions conducting flood irrigation, irrigation practice often results in the temporary formation of water ponds in the cropland, which plays a critical role in agricultural productivity. The prompt identification of irrigation wat…
View article: Impact of gradient zero-valent iron pollution from steel works on soil microaggregate geochemical processes and dissipative structures
Impact of gradient zero-valent iron pollution from steel works on soil microaggregate geochemical processes and dissipative structures Open
Zero-valent iron (ZVI) contamination from steel works poses significant threats to soil quality and ecosystem health, particularly affecting soil microaggregates, which are fundamental to soil structure and function. In this study, we syst…
View article: An improved optical trapezoid model to identify wetlands and irrigation water ponds in the arid irrigation district using Google Earth Engine
An improved optical trapezoid model to identify wetlands and irrigation water ponds in the arid irrigation district using Google Earth Engine Open
In arid regions, wetlands support ecosystem with high biodiversity and productivity. Meanwhile, irrigation during the fallow period often results in the temporary formation of water ponds in the cropland, which plays a critical role in agr…
View article: Land Reforestation and Its Impact on the Environmental Footprints Across Districts of Khyber Pakhtunkhwa in Pakistan
Land Reforestation and Its Impact on the Environmental Footprints Across Districts of Khyber Pakhtunkhwa in Pakistan Open
This study integrates various remote sensing datasets to analyze environmental changes and their impacts on ecosystems across Pakhtunkhwa Province in Pakistan. Precipitation data from the Climate Hazards Group InfraRed Precipitation with S…
View article: Attribution of climate change and human activities to spatiotemporal changes of ecological service value in Yunnan Province of China
Attribution of climate change and human activities to spatiotemporal changes of ecological service value in Yunnan Province of China Open
Quantifying the influence of climate change and human activities on spatiotemporal changes of regional ecological service value (ESV) can provide key information for regional ecosystem protection. However, few studies have distinguished th…
View article: Dynamic and empirical methods for field capacity estimation in fine textured soils with a coarse interlayer
Dynamic and empirical methods for field capacity estimation in fine textured soils with a coarse interlayer Open
Field capacity (FC) is an important soil hydraulic concept in soil science and irrigation management. It is generally determined from soil water content in a soil layer when soil profile reaches a steady pressure head or negligible drainag…
View article: Catchment-scale assessment of drought impact on environmental flow in the Indus Basin, Pakistan
Catchment-scale assessment of drought impact on environmental flow in the Indus Basin, Pakistan Open
The impact of drought on environmental flow (EF) in 27 catchments of the Indus Basin is studied from 1980–2018 using indicators of hydrologic alterations (IHAs). The standardized precipitation evapotranspiration index (SPEI) was systematic…
View article: Integrated assessment of crop planting suitability: A case study in the Hetao Irrigation District of China using HJ-1A/1B satellite data
Integrated assessment of crop planting suitability: A case study in the Hetao Irrigation District of China using HJ-1A/1B satellite data Open
The increasing demand for food due to population growth and climate change poses significant challenges to achieve the Sustainable Development Goal of zero hunger by 2030. A key aspect in overcoming these challenges is to determine appropr…
View article: A robust integrated agricultural drought index under climate and land use variations at the local scale in Pakistan
A robust integrated agricultural drought index under climate and land use variations at the local scale in Pakistan Open
This study aims to develop an integrated agricultural drought index (IADI) that incorporates multiple remote sensing-based agricultural drought indices, considering variations in climate and land use at a local scale in ten different agro-…
View article: Superiority of Dynamic Weights against Fixed Weights in Merging Multi-Satellite Precipitation Datasets over Pakistan
Superiority of Dynamic Weights against Fixed Weights in Merging Multi-Satellite Precipitation Datasets over Pakistan Open
Satellite precipitation products (SPPs) are undeniably subject to uncertainty due to retrieval algorithms and sampling issues. Many research efforts have concentrated on merging SPPs to create high-quality merged precipitation datasets (MP…
View article: Multi-year mapping of cropping systems in regions with smallholder farms from Sentinel-2 images in Google Earth engine
Multi-year mapping of cropping systems in regions with smallholder farms from Sentinel-2 images in Google Earth engine Open
Accurate acquisition of spatial and temporal distribution information for cropping systems is important for agricultural production and food security. The challenges of extracting information about cropping systems in regions with smallhol…
View article: Editorial on Hydrology and Water Resources in Agriculture and Ecology
Editorial on Hydrology and Water Resources in Agriculture and Ecology Open
The agricultural sector uses the largest share of freshwater, accounting for over 70% of the global freshwater withdrawals, and this proportion can be up to 90% in arid and semiarid regions [...]
View article: Reply on RC2
Reply on RC2 Open
Abstract. The impact of drought on environmental flow (EF) in 27 catchments of the Indus basin is studied from 1980–2018 using the Indicators of Hydrologic Alterations (IHA). The standardized Precipitation Evapotranspiration Index (SPEI) w…
View article: Reply on RC1
Reply on RC1 Open
Abstract. The impact of drought on environmental flow (EF) in 27 catchments of the Indus basin is studied from 1980–2018 using the Indicators of Hydrologic Alterations (IHA). The standardized Precipitation Evapotranspiration Index (SPEI) w…
View article: Estimating soil water and salt contents from field measurements with time domain reflectometry using machine learning algorithms
Estimating soil water and salt contents from field measurements with time domain reflectometry using machine learning algorithms Open
Soil water and salt contents are key soil physical parameters that play a crucial role in soil-related hydrological, ecological, environmental, and agricultural processes. Time domain reflectometry (TDR) is commonly used to measure in-situ…
View article: Deep Learning-based Near-real-time Monitoring of Autumn Irrigation Extent at Sub-pixel Scale in a Large Irrigation District
Deep Learning-based Near-real-time Monitoring of Autumn Irrigation Extent at Sub-pixel Scale in a Large Irrigation District Open
Flood irrigation is widely applied in harvested croplands of arid regions and can be classified as autumn/winter irrigation (AI) depending on the time of application. Due to its high water consumption, real-time monitoring of the AI extent…
View article: Comment on nhess-2023-4
Comment on nhess-2023-4 Open
Abstract. The impact of drought on environmental flow (EF) in 27 catchments of the Indus basin is studied from 1980–2018 using the Indicators of Hydrologic Alterations (IHA). The standardized Precipitation Evapotranspiration Index (SPEI) w…
View article: Comment on nhess-2023-4
Comment on nhess-2023-4 Open
Abstract. The impact of drought on environmental flow (EF) in 27 catchments of the Indus basin is studied from 1980–2018 using the Indicators of Hydrologic Alterations (IHA). The standardized Precipitation Evapotranspiration Index (SPEI) w…
View article: Catchment scale assessment of drought impact on environmental flow in the Indus Basin, Pakistan
Catchment scale assessment of drought impact on environmental flow in the Indus Basin, Pakistan Open
The impact of drought on environmental flow (EF) in 27 catchments of the Indus basin is studied from 1980–2018 using the Indicators of Hydrologic Alterations (IHA). The standardized Precipitation Evapotranspiration Index (SPEI) was systema…
View article: Structure and biogeochemical process of microaggregates in a water source area of China’s South-to-North Water Diversion Project according to different land use types
Structure and biogeochemical process of microaggregates in a water source area of China’s South-to-North Water Diversion Project according to different land use types Open
Soil biogeochemical processes have the potential to impact water quality in source areas of water diversion projects. This study aimed to explore the differences in biochemical processes and mechanisms at the microaggregate scale for diffe…
View article: Drought Monitoring Using Landsat Derived Indices and Google Earth Engine Platform: A Case Study from Al-Lith Watershed, Kingdom of Saudi Arabia
Drought Monitoring Using Landsat Derived Indices and Google Earth Engine Platform: A Case Study from Al-Lith Watershed, Kingdom of Saudi Arabia Open
Precise assessment of drought and its impact on the natural ecosystem is an arduous task in regions with limited climatic observations due to sparsely distributed in situ stations, especially in the hyper-arid region of Kingdom of Saudi Ar…
View article: Multi-year mapping of flood autumn irrigation extent and timing in harvested croplands of arid irrigation district
Multi-year mapping of flood autumn irrigation extent and timing in harvested croplands of arid irrigation district Open
Flood irrigation after crop harvest, e.g. autumn irrigation (AI), is a common irrigation practice in arid and semi-arid regions like Hetao Irrigation District (HID) in Northwest China to increase soil moisture and leach soil salt. Detailed…