Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

The sinking of the land surface due to aquifer compaction caused by excessive groundwater extraction in arid regions is called what?

Answer and explanation

Correct answer: Land subsidence

Correct answer: B, land subsidence. An aquifer is a layer of permeable material that stores and transmits groundwater. When too much groundwater is pumped out, water pressure in the pores can fall. The grains or layers forming the aquifer may then compact, especially where fine sediments are present. The ground surface above it moves downward; this sinking is called land subsidence. A is wrong because erosion removes and transports soil or rock by water, wind or ice; it is not the downward settling caused by aquifer compaction. C is wrong because percolation is the downward movement of water through soil and rock. D is wrong because runoff is water flowing across the land surface. The key chain is: excessive pumping, reduced pore-water support, aquifer compaction, surface sinking. Memory cue: subsidence means the surface subsides, or settles downward.

Related tags

Land-SubsidenceGroundwaterAquiferHydrological CycleThe Living WorldBiologyClass 11 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.