Bunkei Matsushita
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View article: Combining two water type classification schemes for semi-analytical estimation of suspended particulate matter concentrations in various water bodies
Combining two water type classification schemes for semi-analytical estimation of suspended particulate matter concentrations in various water bodies Open
Retrieval of suspended particulate matter concentration (SPM) from remote-sensing reflectance (Rrs) is useful for frequent and widespread monitoring of water quality. However, Rrs values vary not only with SPM but also with particle compos…
View article: Combining Satellite Image Standardization and Self-Supervised Learning to Improve Building Segmentation Accuracy
Combining Satellite Image Standardization and Self-Supervised Learning to Improve Building Segmentation Accuracy Open
Many research fields, such as urban planning, urban climate and environmental assessment, require information on the distribution of buildings. In this study, we used U-Net to segment buildings from WorldView-3 imagery. To improve the accu…
View article: Estimating the concentration of total suspended solids in inland and coastal waters from Sentinel-2 MSI: A semi-analytical approach
Estimating the concentration of total suspended solids in inland and coastal waters from Sentinel-2 MSI: A semi-analytical approach Open
Inland and coastal waters provide key ecosystem services and are closely linked to human well-being. In this study, we propose a semi-analytical method, which can be applied to Sentinel-2 MultiSpectral Instrument (MSI) images to retrieve h…
View article: Evaluation of the Health Status of Indonesian Watersheds Using Impervious Surface Area as an Indicator
Evaluation of the Health Status of Indonesian Watersheds Using Impervious Surface Area as an Indicator Open
Impervious surfaces affect the ecosystem function of watersheds. Therefore, the impervious surface area percentage (ISA%) in watersheds has been regarded as an important indicator for assessing the health status of watersheds. However, acc…
View article: Author Correction: GLORIA - A globally representative hyperspectral in situ dataset for optical sensing of water quality
Author Correction: GLORIA - A globally representative hyperspectral in situ dataset for optical sensing of water quality Open
View article: GLORIA - A globally representative hyperspectral in situ dataset for optical sensing of water quality
GLORIA - A globally representative hyperspectral in situ dataset for optical sensing of water quality Open
View article: Mapping Multi-Decadal Mangrove Extent in the Northern Coast of Vietnam Using Landsat Time-Series Data on Google Earth Engine Platform
Mapping Multi-Decadal Mangrove Extent in the Northern Coast of Vietnam Using Landsat Time-Series Data on Google Earth Engine Platform Open
A pixel-based algorithm for multi-temporal Landsat (TM/ETM+/OLI/OLI-2) imagery between 1990 and 2022 monitored mangrove dynamics and detected their changes in the three provinces (i.e., Thai Binh, Nam Dinh and Hai Phong), which are located…
View article: A Semianalytical Algorithm for Estimating Water Transparency in Different Optical Water Types from MERIS Data
A Semianalytical Algorithm for Estimating Water Transparency in Different Optical Water Types from MERIS Data Open
Water transparency (or Secchi disk depth: ZSD) is a key parameter of water quality; thus, it is very important to routinely monitor. In this study, we made four efforts to improve a state-of-the-art ZSD estimation algorithm that was develo…
View article: Simultaneous retrieval of selected optical water quality indicators from Landsat-8, Sentinel-2, and Sentinel-3
Simultaneous retrieval of selected optical water quality indicators from Landsat-8, Sentinel-2, and Sentinel-3 Open
Constructing multi-source satellite-derived water quality (WQ) products in inland and nearshore coastal waters from the past, present, and future missions is a long-standing challenge. Despite inherent differences in sensors’ spectral capa…
View article: Quantitative Assessment of Decadal Water Temperature Changes in Lake Kasumigaura, a Shallow Turbid Lake, Using a One-Dimensional Model
Quantitative Assessment of Decadal Water Temperature Changes in Lake Kasumigaura, a Shallow Turbid Lake, Using a One-Dimensional Model Open
View article: Ecosystem Services Monitoring in the Muthurajawela Marsh and Negombo Lagoon, Sri Lanka, for Sustainable Landscape Planning
Ecosystem Services Monitoring in the Muthurajawela Marsh and Negombo Lagoon, Sri Lanka, for Sustainable Landscape Planning Open
In this study, we examined the impacts of urbanization on the natural landscape and ecosystem services of the Muthurajawela Marsh and Negombo Lagoon (MMNL) located in the Colombo Metropolitan Region, Sri Lanka, with the goal to help inform…
View article: Lake water quality observed after extreme rainfall events: implications for water quality affected by stormy runoff
Lake water quality observed after extreme rainfall events: implications for water quality affected by stormy runoff Open
View article: Long-term change of water clarity in Lake Limboto derived from Landsat data
Long-term change of water clarity in Lake Limboto derived from Landsat data Open
Long-term water quality data is important for supporting lake management. Performing routine in situ water quality measurement remains a challenge; thus, the available data are minimal. Long-term data archived of satellite data potentially…
View article: Remotely estimating total suspended solids concentration in clear to extremely turbid waters using a novel semi-analytical method
Remotely estimating total suspended solids concentration in clear to extremely turbid waters using a novel semi-analytical method Open
View article: Impacts of Urbanization on the Muthurajawela Marsh and Negombo Lagoon, Sri Lanka: Implications for Landscape Planning towards a Sustainable Urban Wetland Ecosystem
Impacts of Urbanization on the Muthurajawela Marsh and Negombo Lagoon, Sri Lanka: Implications for Landscape Planning towards a Sustainable Urban Wetland Ecosystem Open
Urban wetland ecosystems (UWEs) play important social and ecological roles but are often adversely affected by urban landscape transformations. Spatio-temporal analyses to gain insights into the trajectories of landscape changes in these e…
View article: Robust algorithm for estimating total suspended solids (TSS) in inland and nearshore coastal waters
Robust algorithm for estimating total suspended solids (TSS) in inland and nearshore coastal waters Open
View article: Seamless retrievals of chlorophyll-a from Sentinel-2 (MSI) and Sentinel-3 (OLCI) in inland and coastal waters: A machine-learning approach
Seamless retrievals of chlorophyll-a from Sentinel-2 (MSI) and Sentinel-3 (OLCI) in inland and coastal waters: A machine-learning approach Open
Consistent, cross-mission retrievals of near-surface concentration of chlorophyll-a (Chla) in various aquatic ecosystems with broad ranges of trophic levels have long been a complex undertaking. Here, we introduce a machine-learning model,…
View article: Long-Term Change of the Secchi Disk Depth in Lake Maninjau, Indonesia Shown by Landsat TM and ETM+ Data
Long-Term Change of the Secchi Disk Depth in Lake Maninjau, Indonesia Shown by Landsat TM and ETM+ Data Open
Most of the lakes in Indonesia are facing environmental problems such as eutrophication, sedimentation, and depletion of dissolved oxygen. The water quality data for supporting lake management in Indonesia are very limited due to financial…
View article: Decadal change in tripton concentration in a shallow lake
Decadal change in tripton concentration in a shallow lake Open
View article: Role of wetlands in mitigating the trade‐off between crop production and water quality in agricultural landscapes
Role of wetlands in mitigating the trade‐off between crop production and water quality in agricultural landscapes Open
Agriculture faces the great challenge of developing strategies to maintain production while simultaneously reducing environmental impacts. The trade‐off between crop production and water quality services is one of the most serious issues f…
View article: An improved algorithm for estimating the Secchi disk depth from remote sensing data based on the new underwater visibility theory
An improved algorithm for estimating the Secchi disk depth from remote sensing data based on the new underwater visibility theory Open
View article: An Overall Evaluation of Water Transparency in Lake Malawi from MERIS Data
An Overall Evaluation of Water Transparency in Lake Malawi from MERIS Data Open
Lake Malawi is an important water resource in Africa. However, there is no routine monitoring of water quality in the lake due to financial and institutional constraints in the surrounding countries. A combination of satellite data and a s…
View article: Factors explaining the yearly changes in minimum bottom dissolved oxygen concentrations in Lake Biwa, a warm monomictic lake
Factors explaining the yearly changes in minimum bottom dissolved oxygen concentrations in Lake Biwa, a warm monomictic lake Open
Vertical profiles of dissolved oxygen (DO) and water temperature (WT) measured bi-monthly for 36 years (1980–2015) near the deepest part of a warm monomictic lake were analyzed with special reference to yearly minimum DO at bottom (DOmin).…
View article: Correction: Corrigendum: Will hypolimnetic waters become anoxic in all deep tropical lakes?
Correction: Corrigendum: Will hypolimnetic waters become anoxic in all deep tropical lakes? Open
View article: An easily implemented method to estimate impervious surface area on a large scale from MODIS time-series and improved DMSP-OLS nighttime light data
An easily implemented method to estimate impervious surface area on a large scale from MODIS time-series and improved DMSP-OLS nighttime light data Open
View article: Optical types of inland and coastal waters
Optical types of inland and coastal waters Open
Inland and coastal waterbodies are critical components of the global biosphere. Timely monitoring is necessary to enhance our understanding of their functions, the drivers impacting on these functions and to deliver more effective manageme…
View article: Will hypolimnetic waters become anoxic in all deep tropical lakes?
Will hypolimnetic waters become anoxic in all deep tropical lakes? Open
View article: Uji Akurasi Produk Reflektan-Permukaan Landsat Menggunakan Data In situ di Danau Kasumigaura, Jepang
Uji Akurasi Produk Reflektan-Permukaan Landsat Menggunakan Data In situ di Danau Kasumigaura, Jepang Open
Estimasi parameter kualitas air (seperti: konsentrasi klorofil-a, konsentrasi TSS dan koefisien absorpsi CDOM) dari data satelit penginderaan jauh umumnya tergantung pada keakuratan koreksi atmosfer dan model yang menghubungkan antara data…