{"id":204,"date":"2022-06-08T13:25:33","date_gmt":"2022-06-08T17:25:33","guid":{"rendered":"https:\/\/deptest.nj.gov\/floodemergencyrule\/?page_id=204"},"modified":"2023-06-28T12:55:20","modified_gmt":"2023-06-28T16:55:20","slug":"lessons","status":"publish","type":"page","link":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/lessons\/","title":{"rendered":"Lessons from Tropical Storm Ida"},"content":{"rendered":"<p>[vc_row full_width=&#8221;stretch_row_content_no_spaces&#8221;][vc_column][vc_column_text]<img decoding=\"async\" class=\"w-100\" src=\"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-content\/uploads\/sites\/180\/lesssons-banner.jpg\" alt=\"Rescue after Hurricane Ida\" \/>[\/vc_column_text][vc_raw_html]JTNDZGl2JTIwY2xhc3MlM0QlMjJjYXJvdXNlbC1jYXB0aW9uJTIwZC1tZC1ibG9jayUyMGQtc20tYmxvY2slMjIlM0UlMEElM0NoMSUzRUxlc3NvbnMlMjBmcm9tJTIwVHJvcGljYWwlMjBTdG9ybSUyMElkYSUzQyUyRmgxJTNFJTBBJTNDJTJGZGl2JTNF[\/vc_raw_html][\/vc_column][\/vc_row][vc_row][vc_column][breadcrumb-shortcode][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;2\/3&#8243;][vc_column_text]<\/p>\n<h3><strong>Directly Resulted in The Loss of Thirty Lives<\/strong><\/h3>\n<ul>\n<li>Second deadliest natural disaster event to impact New Jersey in a century (<a href=\"https:\/\/nj.gov\/njoem\/plan-prepare\/floods.shtml\">See flooding safety tips<\/a>)<\/li>\n<\/ul>\n<h3><strong>Record Rainfalls<\/strong><\/h3>\n<ul>\n<li>Newark experienced an all-time record for highest one-hour rainfall total (3.65 inches)<\/li>\n<li>Documented 10+ inches of rainfall in parts of Hunterdon, Essex, Middlesex and Union Counties<\/li>\n<\/ul>\n<h3><strong>Severe Flash Flooding Due to Intense Precipitation <\/strong><\/h3>\n<ul>\n<li>Storm sewers were overwhelmed<\/li>\n<li>Streams and rivers couldn\u2019t convey so much water in such a short time<\/li>\n<li>More than 12 rivers exceeded their 100-year flood levels<\/li>\n<\/ul>\n<h3><strong>Ida Compared with Existing Flood Hazard Rules<\/strong><\/h3>\n<p>The current FHACA Rules set the design flood elevation (DFE) as the higher of:<\/p>\n<ul>\n<li>Flood elevation mapped by NJDEP<\/li>\n<li>FEMA 100-year elevation plus 1 ft<\/li>\n<\/ul>\n<p>Ida case studies show average elevations of <strong>3.1 feet above<\/strong> FEMA\u2019s 100-year flood elevation<\/p>\n<h3><strong>New Design Flood Elevation (DFE)<\/strong><\/h3>\n<ul>\n<li>To help protect communities from future flood damage, the DFE along streams and rivers will be raised by 2 ft above current standard.<\/li>\n<li>New DFE is the higher of:\n<ul>\n<li>Flood elevation mapped by NJDEP (where available) plus 2 ft<\/li>\n<li>FEMA 100-year elevation plus 3 ft<\/li>\n<\/ul>\n<\/li>\n<li>When calculating flow rates to determine DFE:\n<ul>\n<li>Compute flow rates based on future anticipated 100-year precipitation<\/li>\n<li>Model design flood based on 125% of the computed flow rates<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><strong>New Stormwater Management Standards<\/strong><\/h3>\n<ul>\n<li>Account for existing increased rainfall and prepare for likely further increases results in nominal additional effort or cost during development<\/li>\n<li>Achieve greater runoff and flood control with, for example, a 2% increase in the amount of property required for stormwater controls<\/li>\n<li>Deploy regulation consistent with Governor EO 100 approach of utilizing flexible standards commensurate with risk recognizing that no one-size fits all<\/li>\n<li>See potential increases in the size of stormwater BMPs to accommodate the adjusted rainfall amounts for a warehouse development in examples below<\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;413&#8243; img_size=&#8221;full&#8221; add_caption=&#8221;yes&#8221; alignment=&#8221;right&#8221; onclick=&#8221;link_image&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;417&#8243; img_size=&#8221;full&#8221; add_caption=&#8221;yes&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;418&#8243; img_size=&#8221;full&#8221; add_caption=&#8221;yes&#8221;][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row full_width=&#8221;stretch_row_content_no_spaces&#8221;][vc_column][vc_column_text][\/vc_column_text][vc_raw_html]JTNDZGl2JTIwY2xhc3MlM0QlMjJjYXJvdXNlbC1jYXB0aW9uJTIwZC1tZC1ibG9jayUyMGQtc20tYmxvY2slMjIlM0UlMEElM0NoMSUzRUxlc3NvbnMlMjBmcm9tJTIwVHJvcGljYWwlMjBTdG9ybSUyMElkYSUzQyUyRmgxJTNFJTBBJTNDJTJGZGl2JTNF[\/vc_raw_html][\/vc_column][\/vc_row][vc_row][vc_column][breadcrumb-shortcode][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;2\/3&#8243;][vc_column_text] Directly Resulted in The Loss of Thirty Lives Second deadliest natural disaster event to impact New Jersey in a century (See flooding safety tips) Record Rainfalls Newark experienced an all-time record for highest one-hour rainfall total (3.65 inches) Documented 10+ inches of rainfall in parts of Hunterdon, Essex, Middlesex and Union Counties [&hellip;]<\/p>\n","protected":false},"author":113,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"fullwidth.php","meta":{"footnotes":""},"class_list":["post-204","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-json\/wp\/v2\/pages\/204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-json\/wp\/v2\/users\/113"}],"replies":[{"embeddable":true,"href":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-json\/wp\/v2\/comments?post=204"}],"version-history":[{"count":0,"href":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-json\/wp\/v2\/pages\/204\/revisions"}],"wp:attachment":[{"href":"https:\/\/deptest.nj.gov\/inland-flood-protection-rule\/wp-json\/wp\/v2\/media?parent=204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}