Leaf chlorophyll content (LCC) is an important indicator of foliar nitrogen status and photosynthetic capacity. Accurate and timely mapping of LCC will benefit agronomists to guide fertilizer applications and ecologists to improve carbon flux estimation. In recent decades, remote sensing techniques have been widely used to estimate LCC with empirical and physical models. Physical models are developed based on radiative transfer models that relate LCC to observed reflectance. The common practice of empirical modeling is to establish statistical relationships between LCC and ve...
release time:
2023
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02
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13
Views：22
Heavy metals in soil are harmful, and their migration and accumulation can seriously threaten ecological environmental security and human health. Arsenic (As) exhibits high neurotoxicity and teratogenicity. Much As is released into soil during human activities, including mining operations and industrial production activities. Determining the As concentration in soil quickly and accurately is important for As pollution assessment. The traditional heavy metal survey method aims to perform chemical property testing of soil samples collected in the field, which is a costly and time-consuming metho...
release time:
2022
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12
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06
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Identification and characteristic analysis of urban vegetation spectra under different dust depositionIn recent years, the ecological environment of cities has suffered a lot from damages due to the acceleration of urbanization. The transportation network, traffic flow, industrial activities, and the use of fossil fuels are sources of serious particulate pollutants in the urban greening environment. People pay more and more attention to dust pollution. Dust deposition capacity of plants, that is, the amount of dust deposited within unit time and unit leaf area, can reflect air quality status a...
release time:
2022
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11
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14
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An advanced soil organic carbon content prediction model via fused temporal-spatial-spectral (TSS) information based on machine learning and deep learning algorithmsIn the global carbon cycle, soil organic carbon (SOC) is the largest terrestrial carbon reservoir, which accounts for approximately 50-80% of the total terrestrial carbon, contains more than three times as much as the atmosphere or vegetation, and determines a landscape's carbon source/sink ability. Knowledge of the SOC content is critical for environmental sustainability and carbon neutrality. With the development of remote se...
release time:
2022
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10
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24
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Retrieval of Suspended Sediment Concentrations in the Pearl River Estuary Using Multi-Source Satellite ImageryMonitoring and quantifying suspended sediment concentrations (SSC) in estuaries such as the Pearl River Estuary (PRE) provide crucial information for environmental processes, hydrological infrastructure, and navigation. Traditional SSC mapping based on in situ investigations lacks the spatial coverage necessitated by detailed analysis. Whereas many previous studies have shown that SSC monitoring based on satellite imagery is an effective way to investigate the patterns and changes of S...
release time:
2022
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09
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01
Views：17
Estimation of total iron in soil using a water-absorption-peak-based color reconstructing machine (WCRM) methodSoil iron (Fe) is one of the necessary trace elements for plant growth. An iron deficit will affect the growth of plants, but excess iron can pollute soil and water and harm human health through the food chain and water sources. Effective monitoring of the dynamic change of soil Fe is important to guarantee soil and water quality, and human health. Soil spectroscopy technology has recently received extensive attention and has been used in the estimation of soil properties, because it ...
release time:
2022
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08
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01
Views：3
Retrieving soil heavy metals concentrations based on GaoFen-5 hyperspectral satellite image at an opencast coal mine, Inner Mongolia, ChinaSoil heavy metals pollution has been becoming one of the severely environmental issues globally. Although mine resources development is vital for socioeconomic, some adverse effects generated by mine development on the natural environment were unavoidable. So, investigating soil heavy metals distribution in the open-pit coal mine is strongly desired because the results are meaningful for detecting contaminated fields, supplying land reclamation strateg...
release time:
2022
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05
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26
Views：10
Soil moisture content estimate with drying process segmentation using shortwave infrared bandsSoil moisture is an essential factor directly impacting a variety of environmental processes, including evaporation, infiltration, and runoff, etc. Moreover, soil moisture also plays an important role in related fields of studies, such as evapotranspiration and food security for agriculture, wetland degradation for ecosystem balance, drought for climate change, and even energy exchange between land-atmosphere interface.Ground-based measurements can provide data that are easily calibrated and acquired ...
release time:
2022
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05
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07
Views：10
In recent decades, massively increasing nutrient discharge from soil erosion, agricultural activity, and anthropogenic sewage has resulted in the significant deterioration and eutrophication of freshwater ecosystems, becoming a pressing environmental problem in many countries. Eutrophication results in undesirable ecological consequences. Phosphorus is an essential bio-limiting nutrient responsible for eutrophication and water quality deterioration, thereinto particulate phosphorus (PP) serves as an important potential source of phosphorus for the growth of phytoplankton and bacteria, thereby ...
release time:
2022
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04
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25
Views：9
Estimation of biomass and nutritive value of grass and clover mixtures by analyzing spectral and crop height data using chemometric methods Accurate estimation of forage characteristics is needed to guide decision making on fertilization and harvesting schedules for farmers. It is a common practice to estimate forage nutritive value by laboratory analysis, which limits in-field decision making. Field spectroscopy offers a nondestructive approach to obtain crop biochemical information by measuring and analyzing canopy spectral reflectance (CSR). Crop height is an important agronomic parame...
release time:
2022
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01
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24
Views：29