Chair of Hydrogeology @ TUM’s Post

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“Groundwater recharge in the Silala, a small river, originating in the Andean Altiplano, which flows from Bolivia into Chile”   A semi-distributed hydrological model was used to estimate the discharges from the basin and provide recharge inputs to a groundwater model used to investigate the effects of channelization.     Long-term temperature and precipitation data were available for 1969–1992, while more detailed data were available for 2018–2019.  The 1969–1992 period was selected as a suitable length of record for long-term groundwater recharge estimation, and the recent data were reserved for model validation. Prior model parameter ranges were identified based on field observations and scientific literature, and sampling of both input and parameter uncertainty allowed determination of representative, lower and upper groundwater recharge scenarios.   Results showed strong inter-annual and seasonal variability, the largest groundwater recharge being observed during the Austral summer.  A representative groundwater recharge rate of 39.5 mm/year was obtained for the basin to the international border, with feasible lower and upper bounds of 34.9 and 50.2 mm/year, respectively.  While this lies within the range of 21–51 mm/year estimated by Bolivia for 1969–2017, albeit higher than their best estimate (24 mm/year), disclosing the confidence limits and assumed errors associated with these numbers is necessary.   See Yáñez-Morroni et al., (2023) in WIRES Water, “Hydrological modeling of the Silala River basin. 1. Model development and long-term groundwater recharge assessment”

Editor's Choice Article for the Aug. 2023 Issue of JHE: "Novel Threshold Self-Regulating Water Extraction Method" by Dong et al. This study introduces a novel self-learning water body extraction method, TSLWEM, using modified MNDWI data with optimal extraction thresholds. The TSLWEM algorithm achieves high recognition accuracy, particularly in identifying small tributaries, offering valuable support for water resource management and monitoring in temperate and semiarid regions, ultimately contributing to the protection and sustainable utilization of water resources. To read the article, please visit: https://lnkd.in/ez85mMm7 For other Editor's Choice articles, please visit: https://lnkd.in/gJN2fAT #water #hydrology #floods #engineering #remotesensing #rivers #lakes

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🌟 𝙒𝙚𝙗𝙞𝙣𝙖𝙧 𝘼𝙡𝙚𝙧𝙩 🌟 Dive deep into the incredible capabilities of OpenFlows WaterGEMS with us!   📅 𝗗𝗮𝘁𝗲: 10th April, 2024 🕒 𝗧𝗶𝗺𝗲: 11:30 AM IST 👨💼 𝗚𝘂𝗲𝘀𝘁 𝗦𝗽𝗲𝗮𝗸𝗲𝗿: sandeepan chowdhury 📍 𝗥𝗲𝗴𝗶𝘀𝘁𝗲𝗿 𝗛𝗲𝗿𝗲: https://lnkd.in/gU9TN9wF   𝗞𝗲𝘆 𝗧𝗮𝗸𝗲𝗮𝘄𝗮𝘆𝘀: 1️⃣ Utilizing WaterGEMS for robust design of intermittent and 24x7 water supply schemes. 2️⃣ Exploring Valve placement with the criticality tool. 3️⃣ Insights on How to View the Criticality Analysis Results. 4️⃣ Harnessing the power of WaterGEMS scenario tool for assessing impacts during implementation changes.   Don't miss out! 𝙃𝘼𝙋𝙋𝙔 𝙈𝙊𝘿𝙀𝙇𝙄𝙉𝙂 #water #watersupply #watermanagement #waterinfrastructure #watersolution #waterdistribution #hydraulics #hydrology #hydraulicmodeling #WaterGEMS #OpenFlows #24X7

Editor's Choice Article for the Dec. 2023 Issue of JHE: "A Note on the Time of Concentration" by Vijay Singh Multiple equations exist for calculating the time of concentration, yet there has been no effort to assess how storm direction, duration, and watershed shape influence it. This paper aims to reconsider the notion of time of concentration, scrutinize existing equations empirically, and analyze the effects of storm movement. To read the article, please visit: https://lnkd.in/gaVCcVCE For other Editor's Choice articles, please visit: https://lnkd.in/gJN2fAT #hydrology #runoff #floods #hydraulics #engineering #watermanagement