{"id":452,"date":"2017-11-03T16:07:43","date_gmt":"2017-11-03T16:07:43","guid":{"rendered":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/?post_type=ht_kb&p=452"},"modified":"2017-11-03T16:07:43","modified_gmt":"2017-11-03T16:07:43","slug":"mannings-n-values","status":"publish","type":"ht_kb","link":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/knowledge-base\/mannings-n-values\/","title":{"rendered":"Manning’s n-values"},"content":{"rendered":"\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
Material<\/th>Manning's n<\/th>\n<\/tr>\n<\/thead>\n
PIPES<\/strong><\/td>\n<\/tr>\n
Reinforced concrete<\/td>0.013<\/td>\n<\/tr>\n
Vitrified clay pipe<\/td>0.013<\/td>\n<\/tr>\n
Corrugated metal pipe<\/td>0.023<\/td>\n<\/tr>\n
Polyvinyl chloride (PVC)<\/td>0.010<\/td>\n<\/tr>\n
Smooth welded pipe<\/td>0.011<\/td>\n<\/tr>\n
<\/td><\/td>\n<\/tr>\n
NATURAL CHANNELS<\/strong><\/td>\n<\/tr>\n
Gravel beds, Straight<\/td>0.025<\/td>\n<\/tr>\n
Gravel beds, large boulders<\/td>0.040<\/td>\n<\/tr>\n
Earth, straight, some grass<\/td>0.026<\/td>\n<\/tr>\n
Earth, winding, no vegetation<\/td>0.030<\/td>\n<\/tr>\n
Earth, winding<\/td>0.050<\/td>\n<\/tr>\n
<\/td><\/td>\n<\/tr>\n
EXCAVATED CHANNELS<\/strong><\/td>\n<\/tr>\n
Clean, recently completed <\/td>0.018<\/td>\n<\/tr>\n
With short grass and weeds<\/td>0.027<\/td>\n<\/tr>\n
Earth bottom, rubble banks<\/td>0.030<\/td>\n<\/tr>\n
Stony bottom, weedy banks <\/td>0.035<\/td>\n<\/tr>\n
Not maintained, weeds high as flow depth<\/td>0.080<\/td>\n<\/tr>\n
<\/td><\/td>\n<\/tr>\n
LINED, CONSTRUCTED CHANNELS<\/strong><\/td>\n<\/tr>\n
Concrete, trowel finish<\/td>0.013<\/td>\n<\/tr>\n
Concrete, unfinished<\/td>0.017<\/td>\n<\/tr>\n
Gravel bottom, riprap banks<\/td>0.033<\/td>\n<\/tr>\n
<\/td><\/td>\n<\/tr>\n
OVERLAND \"SHEET\" FLOW<\/strong><\/td>\n<\/tr>\n
Smooth surfaces, Concrete, asphalt, bare Soil
\n<\/td>		0.011<\/td>\n<\/tr>\n
<\/td><\/td>\n<\/tr>\n
Short grass<\/td>0.15<\/td>\n<\/tr>\n
Dense grass<\/td>0.24<\/td>\n<\/tr>\n
Bermuda grass<\/td>0.41<\/td>\n<\/tr>\n
<\/td><\/td>\n<\/tr>\n
Light underbrush woods<\/td>0.40<\/td>\n<\/tr>\n
Dense underbrush woods<\/td>0.80<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Table of Manning’s n-values<\/p>\n","protected":false},"author":1,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[20],"ht-kb-tag":[],"class_list":["post-452","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-useful-tables"],"_links":{"self":[{"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/ht-kb\/452","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/comments?post=452"}],"version-history":[{"count":2,"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/ht-kb\/452\/revisions"}],"predecessor-version":[{"id":454,"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/ht-kb\/452\/revisions\/454"}],"wp:attachment":[{"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/media?parent=452"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/ht-kb-category?post=452"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/learn.hydrologystudio.com\/hydrology-studio\/wp-json\/wp\/v2\/ht-kb-tag?post=452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}