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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Transmissivity; storativity; specific yield？

又称： transmissivity · storativity · specific yield

Definition 23.6 University Earth and Space Sciences — Year 3 · 第 23 章 — Hydrogeology

The transmissivity of an aquifer of thickness $b$ is $T = Kb$ , the flow per unit width under unit gradient, in $\mathrm{m}^{2}/\mathrm{d}$ . Its storativity (or storage coefficient) $S$ is the volume of water released per unit area of the aquifer when the head falls by one unit; it is dimensionless. The specific yield $S_y$ of a rock is the volume of water that drains from it by gravity per unit volume when the water table falls through it.

A schematic section of the cover of the Varden Hills from west to east, not to scale. The chalk holds an unconfined aquifer below its water table. The Jurassic limestone is recharged where it outcrops and is confined beneath the shale: in the well Varden-3 of the problem, drilled through the shale and open only to the limestone, the water rises to the potentiometric surface, far above the top of the aquifer but below the ground.

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