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Assessing drywell designs for managed aquifer recharge via canals and repurposed wells.
Sci Rep
January 2025
USDA, ARS, Sustainable Agricultural Water Systems (SAWS) Unit, UC Davis, 239 Hopkins Road, Davis, CA, 95616, USA.
This study explores innovative drywell designs for managed aquifer recharge (MAR) in agricultural settings, focusing on smaller diameter and deeper drywells, including the repurposing of dried or abandoned wells. Numerical simulations assessed the impact of drywell diameter (5-120 cm), depth (15-55 m), screen height, and subsurface heterogeneity on infiltration (I) and recharge (R) volumes over a one-year period under constant head conditions. Results indicate that smaller diameter drywells can effectively infiltrate and recharge significant water volumes.
View Article and Find Full Text PDFSediment-redox dynamics in an oligotrophic deep-water lake in Tierra del Fuego: insights from Fe isotopes.
J Paleolimnol
April 2024
Department of Earth Sciences, University of Geneva, rue des Maraîchers 13, 1205 Geneva, Switzerland.
Unlabelled: For long time in the history of Earth, ferruginous conditions governed the oceans. With the rise of oxygen during the Proterozoic era and the subsequent evolution of living organisms, worldwide deposition of iron formations occurred. These sedimentary units reveal the transition into oxic oceans, passing by local and transitory euxinic conditions, especially in coastal shelves.
View Article and Find Full Text PDFRealtime estimation of average sand grain diameter and sand bed height and mass for a trailing suction hopper dredger.
Sci Rep
November 2024
School of Intelligent Manufacturing, Nanyang Institute of Technology, Nanyang, 473004, Henan, China.
A Trailing Suction Hopper Dredger (TSHD) in the sailing process, excavating seabed sediment with the drag head and pumping it through the pipeline to the spoil hopper sedimentation. The spoil hopper sedimentation process, as a critical factor affecting the loading yield and efficiency of a dredger, is susceptible to the influence of different average sand grain diameter . However, the soil type tends to change continuously during the loading process, making it difficult to obtain the by measurement or calculation.
View Article and Find Full Text PDFThis article presents a comprehensive benchmarking analysis of merit performance factors in the Effluent Treatment Plants (ETP) of the textile industry. The study aims to identify and evaluate key factors that contribute to the efficient operation and performance of ETPs. The performance of ETP was analyzed by valuable data gained from figures of PH, Dissolved oxygen, Dissolved solids, Suspended solids, Density, COD and BOD.
View Article and Find Full Text PDFEvaluation of the Na-EDTMP/borax system as a non-dispersing, high temperature retarder for oil well cement.
Heliyon
October 2024
Technical University of Munich, Construction Chemistry, Lichtenbergstraße 4, 85747, Garching, Germany.
For well cementing at temperatures above 120 °C, thermal thinning depicts a major problem, promoting particle sedimentation decreasing slurry viscosities. This is partly caused by dispersing properties of common high temperature retarder systems and can lead to imperfect zonal isolation, endangering the stability of the wellbore. Counteracting additives tend to start losing their effectiveness at temperatures >140 °C.
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