{"id":58,"date":"2010-07-27T19:49:00","date_gmt":"2010-07-27T19:49:00","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/2010\/07\/27\/attabad-lake-level-is-rising-again-it-is-clear-that-temperature-is-the-key-control-at-present\/"},"modified":"2010-10-21T13:35:16","modified_gmt":"2010-10-21T17:35:16","slug":"attabad-lake-level-is-rising-again-it-is-clear-that-temperature-is-the-key-control-at-present","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2010\/07\/27\/attabad-lake-level-is-rising-again-it-is-clear-that-temperature-is-the-key-control-at-present\/","title":{"rendered":"Attabad lake level is rising again.  It is clear that temperature is the key control at present."},"content":{"rendered":"<p>The lake level at Attabad is rising again &#8211; the latest NDMA report suggests that the level has increased by 19 inches (41 cm) in the last 24 hours:<\/p>\n<div class=\"separator\" style=\"clear: both;text-align: center\"><a href=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-lake-level-since-overtopping-compound-9.jpg\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" height=\"308\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-lake-level-since-overtopping-compound-9.jpg\" width=\"640\" \/><\/a><\/div>\n<p>It is now clear that the lake level is controlled primarily by local environmental conditions (which in turn are changing the inflow), rather than the spillway properties.&nbsp; Compare the following two graphs.&nbsp; The first is the lake level through July to date:<\/p>\n<div class=\"separator\" style=\"clear: both;text-align: center\"><a href=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-lake-level-since-overtopping-July.jpg\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" height=\"308\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-lake-level-since-overtopping-July.jpg\" width=\"640\" \/><\/a><\/div>\n<p>The second is the <a href=\"http:\/\/www.pakmet.com.pk\/FFD\/index_files\/inflow\/besham.htm\">Pakmet hydrograph for the same period for Besham<\/a>, which is much further down the Hunza valley:<\/p>\n<div class=\"separator\" style=\"clear: both;text-align: center\"><a href=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-besham-1.gif\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" height=\"348\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-besham-1.gif\" width=\"640\" \/><\/a><\/div>\n<p>The similarity in patterns is not because Attabad is controlling the flow at Besham (the Attabad discharge is just a fraction of that at Besham) &#8211; the similar patterns are because the flow at Besham is being controlled by air temperature (i.e. the rate of melt on the snowfields and icecaps), as is the flow, and hence the lake level, at Attabad.<\/p>\n<p>Regular commenter BeforeGoreKneel kindly pointed out that temperature graphs are available online <a href=\"http:\/\/www.pakmet.com.pk\/FFD\/index_files\/temp.htm\">here<\/a> too.&nbsp; The temperature graph for Gilgit is as follows:<\/p>\n<div class=\"separator\" style=\"clear: both;text-align: center\"><a href=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-air-temp-July-1.jpg\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" height=\"438\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2010\/10\/10_07-air-temp-July-1.jpg\" width=\"640\" \/><\/a><\/div>\n<p>The role that temperature is playing in controlling this system is clear.<\/p>\n<p>Meanwhile, it is still not clear as to whether the Frontier Works Organisation (army) has started their operations to lower the lake.&nbsp;<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>The lake level at Attabad is rising again &#8211; the latest NDMA report suggests that the level has increased by 19 inches (41 cm) in the last 24 hours: It is now clear that the lake level is controlled primarily by local environmental conditions (which in turn are changing the inflow), rather than the spillway properties.&nbsp; Compare the following two graphs.&nbsp; The first is the lake level through July to &hellip;<!-- AddThis Advanced Settings generic via filter on wp_trim_excerpt --><!-- AddThis Share Buttons generic via filter on wp_trim_excerpt --><\/p>\n","protected":false},"author":22,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[1],"tags":[967,47,58,15,10],"class_list":["post-58","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-attabad","tag-barrier-lake","tag-hunza","tag-landslide-dam","tag-pakistan"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/58","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/comments?post=58"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/58\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=58"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=58"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=58"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}