Fisheries of River Matla Causing Flood in the River Matla

There is a bad practice going on in the Rivers of India. We are using it for pisciculture but to do that we are restricting the flow path of the rivers. As a result, the width of the rivers is reducing. Look at the following video. This is River Matla. It flows into River Bidyadhari and ultimately to the Bay of Bengal. It is also connected to the Waste Water Channels of Kolkata Metro City. All the wastewater from Kolkata falls into River Kulti, then to Matla, and ultimately to the Bay of Bengal. As the width of the river is narrowing due to the encroachments for pisciculture, if rainfall with a 100-year return period takes place in Kolkata then the entire watershed, including Kolkata, can be submerged into its “own” waste. Think about it.

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Free Ecourse on MCDM Techniques

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Retention Change Indicator

Watershed retain water from rainfall within its soil pores and depressions available in the basin. If this capacity of retention get receeded there will be stress on the supply of both water and food to dependent consumers. Check, whether the watershed on which you are staying maintains a healthy retention capacity ? A new tool will help you to ascertain the same and make you prepared for the uncertainties that may come if the retention capacity of your watershed has changed negatively. Get the tool from www.baipatra.ws Thanks, Mrinmoy

20 Important Fluid Mechanics MCQs for GATE and Engineering Interviews—with Answers and Explanations

Click here to access the full post : https://hydrogeek.substack.com/p/interviewgate-questions-on-fluid?r=c8bxy Fluid Properties and Hydrostatics Q1. A Newtonian fluid has a dynamic viscosity of 0.5 Pa·s and a shear rate of 20 s⁻¹ at a point. What is the shear stress at that point? (a) 5 Pa (b) 10 Pa (c) 15 Pa (d) 25 Pa Answer: (b) 10 Pa — Shear stress = μ × (du/dy) = 0.5 × 20 = 10 Pa, following Newton’s law of viscosity. Q2. The pressure at a depth of 5 m below the free surface of water (density 1000 kg/m³) is approximately: (a) 5 kPa (b) 49 kPa (c) 98 kPa (d) 500 kPa Answer: (b) 49 kPa — Using , Pa ≈ 49 kPa. Q3. A cube of density 800 kg/m³ floats in water of density 1000 kg/m³. What fraction of the cube’s volume is submerged? (a) 0.6 (b) 0.7 (c) 0.8 (d) 0.9 Answer: (c) 0.8 — By Archimedes’ principle, submerged fraction = ρ_body/ρ_fluid = 800/1000 = 0.8. Q4. The excess pressure inside a spherical air bubble of radius r immersed in a liquid with surface tension σ is given by: (a) σ/r...