{"id":496,"date":"2023-06-12T12:56:30","date_gmt":"2023-06-12T07:26:30","guid":{"rendered":"https:\/\/lotusarise.com\/qna\/?p=496"},"modified":"2024-04-03T07:13:56","modified_gmt":"2024-04-03T01:43:56","slug":"q-which-of-the-following-is-are-the-possible-consequence-s-of-heavy-sand-mining-in-riverbeds","status":"publish","type":"post","link":"https:\/\/lotusarise.com\/qna\/upsc\/q-which-of-the-following-is-are-the-possible-consequence-s-of-heavy-sand-mining-in-riverbeds","title":{"rendered":"Q. Which of the following is\/are the possible consequence\/s of heavy sand mining in riverbeds?"},"content":{"rendered":"\n<ol class=\"wp-block-list\" type=\"1\">\n<li>Decreased salinity in the river<\/li>\n\n\n\n<li>Pollution of groundwater<\/li>\n\n\n\n<li>Lowering of the water-table<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Select the correct answer using the code given below.<\/p>\n\n\n\n<ul class=\"mcq wp-block-list\">\n<li>1 only<\/li>\n\n\n\n<li>2 and 3 only<\/li>\n\n\n\n<li>1 and 3 only<\/li>\n\n\n\n<li>1, 2 and 3<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Answer: (b) 2 and 3 only<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Notes:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Heavy sand mining in riverbeds leads to the&nbsp;<strong>increase of&nbsp;velocity of the flowing water, thereby eventually erode&nbsp;the river banks.<\/strong><\/li>\n\n\n\n<li>Sand&nbsp;aquifer helps&nbsp;in&nbsp;recharging&nbsp;the&nbsp;water table;&nbsp;<strong>its progressive depletion&nbsp;in the&nbsp;river&nbsp;is&nbsp;accompanied&nbsp;by the lowering of the water table&nbsp;in the&nbsp;nearby areas.<\/strong><\/li>\n\n\n\n<li>As the&nbsp;<strong>turbidity increases at the&nbsp;mining&nbsp;site, saline water intrusion takes along the coastal aquifers thereby polluting the ground water.<\/strong><\/li>\n\n\n\n<li>It&nbsp;<strong>also leads to an&nbsp;imminent danger of saline water ingress into fresh water.<\/strong><\/li>\n<\/ul>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"Impact\">Impact of Sand Mining on the Environment<\/h6>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Excessive sand mining can alter the river bed, force the river to change course, erode banks, and cause flooding.<\/strong><\/li>\n\n\n\n<li><strong>It causes river and estuary deepening, as well as the expansion of river mouths and coastal inlets.<\/strong><\/li>\n\n\n\n<li><strong>It may also result in saline water intrusion from the nearby sea.<\/strong><\/li>\n\n\n\n<li>Instream mining can have far-reaching consequences that extend beyond the immediate mine sites.<\/li>\n\n\n\n<li>Every year, many hectares of fertile streamside land are lost, as well as valuable timber resources and wildlife habitats in riparian areas. Degraded stream habitats reduce fisheries productivity, biodiversity, and recreational potential.<\/li>\n\n\n\n<li>Sand mining is a direct cause of erosion and has an impact on local wildlife.<\/li>\n\n\n\n<li>Various animals rely on sandy beaches for nesting clutches, and mining has nearly wiped out gharials (a crocodile species) in India.<\/li>\n\n\n\n<li><strong>Sand mining in Chambal has had an impact on the population of Gharials<\/strong>, a critically endangered species (a National Chambal Sanctuary has been established for their conservation).<\/li>\n\n\n\n<li><strong>Mining harms wildlife by removing basking and egg-laying habitat.<\/strong><\/li>\n\n\n\n<li>Turbidity in the water is caused by the disturbance of underwater and coastal sand, which is harmful to organisms that require sunlight, such as coral.<\/li>\n\n\n\n<li><strong>It can also devastate fisheries, causing financial hardship for the operators.<\/strong><\/li>\n\n\n\n<li>As the amount of sand reaching the oceans changes, rivers are unable to replenish the sand on beaches and in deltas.<\/li>\n\n\n\n<li><strong>Increased riverbed and bank erosion raises the concentration of suspended solids in the water both at the excavation site and downstream. Suspended solids can harm water users and aquatic ecosystems.<\/strong><\/li>\n<\/ul>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-_16f5d8-08 .kt-block-spacer{height:40px;}.wp-block-kadence-spacer.kt-block-spacer-_16f5d8-08 .kt-divider{border-top-width:2px;border-top-color:#eee;width:100%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-_16f5d8-08\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Select the correct answer using the code given below. Answer: (b) 2 and 3 only Notes: Impact of Sand Mining on the Environment<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1,3],"tags":[36],"years":[55],"class_list":["post-496","post","type-post","status-publish","format-standard","hentry","category-upsc","category-prelims","tag-environment","years-55"],"acf":[],"taxonomy_info":{"category":[{"value":1,"label":"UPSC"},{"value":3,"label":"Prelims"}],"post_tag":[{"value":36,"label":"Environment"}],"years":[{"value":55,"label":"2018"}]},"featured_image_src_large":false,"author_info":{"display_name":"LotusArise","author_link":"https:\/\/lotusarise.com\/qna\/author\/team-lotusarise"},"comment_info":0,"category_info":[{"term_id":1,"name":"UPSC","slug":"upsc","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":1269,"filter":"raw","cat_ID":1,"category_count":1269,"category_description":"","cat_name":"UPSC","category_nicename":"upsc","category_parent":0},{"term_id":3,"name":"Prelims","slug":"prelims","term_group":0,"term_taxonomy_id":3,"taxonomy":"category","description":"","parent":1,"count":1251,"filter":"raw","cat_ID":3,"category_count":1251,"category_description":"","cat_name":"Prelims","category_nicename":"prelims","category_parent":1}],"tag_info":[{"term_id":36,"name":"Environment","slug":"environment","term_group":0,"term_taxonomy_id":36,"taxonomy":"post_tag","description":"","parent":0,"count":193,"filter":"raw"}],"_links":{"self":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/496","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/comments?post=496"}],"version-history":[{"count":0,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/496\/revisions"}],"wp:attachment":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/media?parent=496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/categories?post=496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/tags?post=496"},{"taxonomy":"years","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/years?post=496"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}