Establishing the Hydrological Controls on Water Surface Area Variations in Oxbow Lakes DOI
Joshua Ahmed

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(12)

Published: Dec. 1, 2024

ABSTRACT Oxbow lakes are iconic fluvial landforms found in the floodplains of meandering rivers around world. Their formation is associated with meander cutoff, a process that excises sections river channel to optimise downstream transmission water and sediment. Overbank floods conveyance through tie channels maintain some hydrological connectivity, but generally considered passively infill until they terrestrialised. Here, suite 64 across two Bolivian Amazon Basin used demonstrate dynamism oxbow by quantifying interannual variations lake surface area (WSA), using modified Normalised Difference Water Index (mNDWI) on an archive Landsat images, evaluating mechanisms controlling these changes remotely sensed rainfall data geospatial analysis. The majority (75%) decreased size over study period, while 25% increased size. results suggest WSA controlled proximity active channel, magnitude being set connectivity. Lakes connected experienced up 3.9 times larger than no visible connection mechanisms. Incursion displayed similar those channels, isolated were furthest from mainstem had smallest range WSAs. Chute wider change (−95% +281%) more strongly neck lakes. Connectivity between essential for governing hydrodynamics, provide critical conduit which can be transmitted deep into floodplain.

Language: Английский

Multi-dimensional scaling for space-time transformation to achieve sustainable planning and management of water resource under changing land use pattern DOI Creative Commons
Mohd Sayeed Ul Hasan, Abhishek Kumar,

Abul Hasan Momin

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 7, 2025

The land use transition plays an important role for terrestrial environmental services, which had a mixed impact of positive and negative on the groundwater water resource. health ecological systems depends mapping management use. Ganga basin is one most densely populated agriculture-intensive river in South Asia world. multi-temporal spatial database includes (ESA-CCI), satellite-based gravity anomaly (GRACE/GRACE-FO), well log (CGWB) adopted this study assessment depth, drought, storage. methodology computation transition, trend magnitude by Sen's slope, Innovative Trend Analysis (ITA) graphical visualization, clustering techniques employ to identify pattern & structure, finally space-time transformation was assessed based multi-dimensional scaling using Alternating Least Squares Scaling (ALSCAL). over two decades shows increase forest (2.23%), wetland (2.2%), settlement (208.4%), bare area (3.18%), (5.18%), decrease agriculture (-1.16%), grassland (-4.5%), vegetation (-2.8%). non-parametric climatological loss maximally observed during post-monsoon season basin. seasonal statistics that, upper northern (left) alarming rate depletion, with increased severity drought near future ITA monotonic decreasing depicting resources. Bi-dimensional regression, ALSCAL that model efficient input data having stress value RSQ (proportion variance) 0.09 0.97 excellent linear fit. obtained low dimensional space showing conversion from sparse vegetation, agriculture, grassland, has maximum TWSA loss, although persistent also responsible. results are extremely useful policymakers, scientists, concern Govt. section, local communities must work together manage sustainably. Water resource can help lessen effects climate change focusing environmental, economic, social, institutional dimensions UN-SDG.

Language: Английский

Citations

0
Landscape connectivity significantly influences the spatial spillover effects of soil erosion: Based on examples from typical karst watersheds DOI
Jiao Pan,

Feiyang Cai,

Yi Zhu

et al.

Ecological Indicators, Journal Year: 2025, Volume and Issue: 173, P. 113373 - 113373

Published: March 23, 2025

Language: Английский

Citations

0
Is satellite-observed surface water expansion a good signal to China’s largest granary? DOI Creative Commons

Han Liang,

Yan Zhou, Yaoping Cui

et al.

Agricultural Water Management, Journal Year: 2024, Volume and Issue: 303, P. 109039 - 109039

Published: Sept. 5, 2024

Language: Английский

Citations

1
Translating science into actions to conserve Amazonian freshwaters DOI Creative Commons
Thiago B. A. Couto, Clinton N. Jenkins, Claire Beveridge

et al.

Conservation Science and Practice, Journal Year: 2024, Volume and Issue: 6(11)

Published: Oct. 9, 2024

Abstract Despite the importance of freshwater ecosystems to social‐ecological systems Amazon, conservation in region historically has focused on terrestrial ecosystems. Moreover, current information pressing management and needs specific freshwaters is scattered across multiple disciplines generally particular threats, habitats, taxa. This disparateness limits ability researchers practitioners set priorities implement actions that comprehensively address challenges faced by To reduce this research‐implementation gap, we reviewed scientific literature Amazon identify be taken potential directions for their implementation. We identified 63 gleaned from 174 publications. These were classified into six major themes: (i) environmental flows, (ii) improve water quality, (iii) protect restore critical (iv) manage exploitation organisms, (v) prevent control invasive species, (vi) safeguard connectivity. Although each action may face different implementation challenges, propose three guiding principles support planning decisions on‐the‐ground. conclude with a reflection future place center policies agreements target Amazon.

Language: Английский

Citations

1
Land Reforestation and Its Impact on the Environmental Footprints Across Districts of Khyber Pakhtunkhwa in Pakistan DOI Open Access
Muhammad Zeeshan Ali, Khalil Ur Rahman, Hidayat Ullah

et al.

Water, Journal Year: 2024, Volume and Issue: 16(20), P. 3009 - 3009

Published: Oct. 21, 2024

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 with Station (CHIRPS) dataset, along vegetation health assessments using Normalized Difference Vegetation Index (NDVI) Land Surface Temperature (LST) Landsat were used comprehensively impact of dynamics footprints (i.e., temperature, precipitation, LST). use maps, generated through supervised classification images 1985 2023, highlight significant different land classes, including forest cover. Bayesian Network Modelling (BNM) Dummy Variable Regression (DVR) methods employed assess (using NDVI time series) footprint cover particular. The results suggest that generally increase cooling effect most area, indicating higher density is linked a decrease temperatures. inverse relationship also apparent connection between LST, depicting negative trend surface temperature over pixels/districts. regression coefficients for LST vary pixels, ranging −5.3839 °C 5.2697 °C, standard deviations 2.057 5.138 reflecting variability strength this effect. Similarly, range −7.1513 6.6322 1.612 4.155 °C. In contrast, precipitation show positive relationship, 4.1686 44.3932 2.242 8.224 suggesting greater corresponding dynamics. Additionally, correlates positively but pixels emphasizes complex nature these relationships. identified substantial fluctuations categories decades, shifts driven by both natural human factors. BNM demonstrated LST. On other hand, cover, particularly due Billion Tree Tsunami Project, has DVR. By combining high-resolution advanced statistical techniques, offers key insights into dynamic interactions vegetation, climate region, providing valuable information sustainable management.

Language: Английский

Citations

1
Establishing the hydrological controls on water surface area variations in oxbow lakes DOI
Joshua Ahmed

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 26, 2024

Oxbow lakes are iconic fluvial landforms found in the floodplains of meandering rivers around world. Their formation is associated with meander cutoff, a process that excises sections river channel to optimise downstream transmission water and sediment. After termination, sedimentary plugs form at either end abandoned isolate it from mainstem. Overbank floods conveyance through tie channels maintains some hydrological connectivity, but generally considered passively infill until they become terrrestrialised. Here, suite 64 across two Bolivian Amazon used demonstrate dynamism oxbow after cutoff by quantifying interannual variations lake surface area (WSA) mechanisms controlling them. The results suggest WSA controlled proximity active channel, magnitude these being set connectivity. Lakes connected experienced changes up 3.9 times larger than no visible connection mechanisms. Incursion displayed similar those channels, while isolated were furthest mainstem had smallest range WSAs. Chute-lakes wider WSAs more strongly neck-lakes. An understanding processes governing hydrodynamics important for forecasting nutrient contaminant fluxes as well sensitivity riparian wetlands catchment hydrology climate change flow modification.

Language: Английский

Citations

0
Establishing the Hydrological Controls on Water Surface Area Variations in Oxbow Lakes DOI
Joshua Ahmed

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(12)

Published: Dec. 1, 2024

ABSTRACT Oxbow lakes are iconic fluvial landforms found in the floodplains of meandering rivers around world. Their formation is associated with meander cutoff, a process that excises sections river channel to optimise downstream transmission water and sediment. Overbank floods conveyance through tie channels maintain some hydrological connectivity, but generally considered passively infill until they terrestrialised. Here, suite 64 across two Bolivian Amazon Basin used demonstrate dynamism oxbow by quantifying interannual variations lake surface area (WSA), using modified Normalised Difference Water Index (mNDWI) on an archive Landsat images, evaluating mechanisms controlling these changes remotely sensed rainfall data geospatial analysis. The majority (75%) decreased size over study period, while 25% increased size. results suggest WSA controlled proximity active channel, magnitude being set connectivity. Lakes connected experienced up 3.9 times larger than no visible connection mechanisms. Incursion displayed similar those channels, isolated were furthest from mainstem had smallest range WSAs. Chute wider change (−95% +281%) more strongly neck lakes. Connectivity between essential for governing hydrodynamics, provide critical conduit which can be transmitted deep into floodplain.

Language: Английский

Citations

0