Results 31 to 40 of about 353,290 (260)

Inversion of shallow water depth from GF-6 multispectral remote sensing image

, 2023
Abstract Aiming at the shallow water depth which is difficult to be measured by traditional ship-borne acoustics, this paper establishes four machine learning models, namely Random forest (RF) model, Gradient Boosting Decision Tree(GBDT) model, extreme gradient boos(XGBoost) model and Support Vector Regression(SVR) model, by using the domestic ...
Yunling Zhang, Yun Hou, Yuping Cui, Yibin Xu, Muyin Chen, Jiaqi Wang, Wei Shen   +6 more
openaire   +1 more source

Evaluation and Improvement of No-Ground-Truth Dual Band Algorithm for Shallow Water Depth Retrieval: A Case Study of a Coastal Island

Remote Sensing, 2022
Conventional bathymetric inversion approaches require bathymetric data as ground truth to obtain shallow water depth from high spatial resolution remote sensing imagery.
Qingjie Yang, Jianyu Chen, Benqing Chen, B. Tao   +3 more
semanticscholar   +1 more source

Oil-water inversion and its generation at top and bottom of the shallow sandstone reservoir in the Northern Chepaizi area, Junggar Basin, NW China

Petroleum Exploration and Development, 2014
Based on fluid property and distribution, the reason for oil-water inversion at top and bottom of the shallow sandstone reservoir of the Neogene Shawan Formation in the Northern Chepaizi area, Junggar Basin was researched from the perspective of ...
Xiaodong ZHAO, Shaochun YANG, Kui XIANG, Guoning CHEN, Chunyan ZHU, Xiaoqing WEI   +5 more
doaj   +1 more source

Retrieval of Nearshore Bathymetry around Ganquan Island from LiDAR Waveform and QuickBird Image

Applied Sciences, 2019
Optical remote sensing is an effective means of water depth measurement, but the current approach of mainstream bathymetric retrieval requires a large amount of onsite measurement data.
Zhen Zhang, Jingyu Zhang, Yi Ma, Huibo Tian, Tao Jiang   +4 more
doaj   +1 more source

Assessing rooting depths of an austrian pine stand by inverse modeling soil water content maps [PDF]

Water Resources Research, 1999
Rooting depths in a forested stand (0.11 ha) were estimated indirectly by inverse modeling maps of soil water contents from time domain reflectometry (TDR) measurements at 150 points. These maps were described with a calibrated one‐dimensional soil water flow model, with specific values for the rooting depth, van Genuchten's [1980] α parameter, and ...
P. A. D. Musters, W. Bouten
openaire   +1 more source

Study on Rapid Inversion of Soil Water Content from Ground-Penetrating Radar Data Based on Deep Learning

Remote Sensing, 2023
Ground-penetrating radar (GPR) is an efficient and nondestructive geophysical method with great potential for detecting soil water content at the farmland scale.
Zhilian Li, Zhaofa Zeng, H. Xiong, Qi Lu, Baizhou An, Jiahe Yan, Risheng Li, Longfei Xia, Haoyu Wang, Kexin Liu   +9 more
semanticscholar   +1 more source

Correcting Multibeam Echosounder Bathymetric Measurements for Errors Induced by Inaccurate Water Column Sound Speeds

IEEE Access, 2019
In this contribution a method for correcting bathymetric measurements affected by inaccurate water column sound speed profiles (SSPs) is presented. The method exploits the redundancy in the multibeam echosounder measurements obtained from the overlap of ...
Tannaz H. Mohammadloo, Mirjam Snellen, Weston Renoud, Jonathan Beaudoin, D. G. Simons   +4 more
doaj   +1 more source

Shallow water depth (≤5 m) estimation based on single-beam echo sounder and optical satellites

Geocarto International
This study combined single-beam echo sounder data with PlanetScope multispectral data to invert shallow water depth (≤5 m) around Weizhou Island, analyzing how each band's reflectance varies with depth by establishing their quantitative relationship and ...
Jianqu Chen, Zhenxiong Yang, Kai Wang, Xunmeng Li, Xu Zhao, Zhangbin Liu, Jian Zhang, Huarong Yuan, Pimao Chen, Shouyu Zhang   +9 more
doaj   +1 more source

Fusion of Drone-Based RGB and Multi-Spectral Imagery for Shallow Water Bathymetry Inversion

Remote Sensing, 2022
Shallow bathymetry inversion algorithms have long been applied in various types of remote sensing imagery with relative success. However, this approach requires that imagery with increased radiometric resolution in the visible spectrum be available.
Evangelos Alevizos, D. Oikonomou, A. Argyriou, D. Alexakis   +3 more
semanticscholar   +1 more source

UAV Remote Sensing Inversion of Pond Water Depth Based on Color-Space Conversion

Redai dili
Shore-based ponds are small water bodies widely distributed in coastal areas and play important roles in aquaculture, agricultural irrigation, and ecological regulation. Accurate and efficient water-depth monitoring is key to the scientific management of
Ma Luodan, Jia Yiwen, Li Xin, Peng Xiaoyan, Deng Yingbin, Li Miao, Li Zhao, Deng Yan, Chen Renrong, Zhou Xia   +9 more
doaj   +1 more source