Gudun kogin kogin

Shige da fice na tashar kogi shine tsarin geomorphological wanda ya haɗa da ƙaura na gefe na tashar kogin da ke fadin ambaliyar ruwa. Wannan tsari galibi ana motsa shi ne ta hanyar haɗuwa da lalacewar banki da kuma sanya maɓallin bar a tsawon lokaci. Lokacin da ake magana game da ƙaurawar tashar kogi, yawanci yana nufin raƙuman ruwa masu juyawa. A cikin koguna masu laushi, canjin tashar yana motsawa ta hanyar jigilar turɓaya.

An ba da shawarar cewa ƙaura ta gefe tsari ne na musamman a cikin shimfidar wurare na Savanna.

 Hanyoyin jiki 

 Rushewar banki 
Yayin da kwarara ya shiga bankin wani kogi mai laushi, ƙarfin centrifugal da aka kirkira ta hanyar karkatarwa yana haifar da kwararar helicoidal, corkscrew kamar tsarin kwararar, wanda ke motsa aikin hydraulic da ke aiki a kan bankin adawa. Wannan shi ne inda tsarin farko a cikin ƙaurawar kogin kogin na Rushewar banki ke faruwa. Sau da yawa bankin yana raguwa, wani sakamako na kwararar helicoidal, wanda ke haifar da ƙirƙirar bankunan da aka yanke. Abubuwan da ke iyakance yawan lalacewar banki sun haɗa da yawan raguwar mashaya, ikon rafi, da kuma matsanancin damuwa na gado na rafi.

 Bayyanawa daga bar 
An kwashe turɓaya daga bankin yayin aiwatar da Rushewar banki a gefen da ke adawa da tashar da ke samar da tsarin da ake kira ma'auni. Hakanan kwararar helicoidal tana taka rawa a cikin wannan tsari ta hanyar aiki a matsayin ɓangaren tashar giciye wanda ke motsa turɓaya zuwa wancan gefen. Hanyoyin zubar da ma'auni da rushewar banki suna haɗuwa kuma a mafi yawan lokuta yawan rushewar bankunan da aka yanke daidai yake da yawan zubar da sanduna. Bugu da ƙari, sandunan ma'ana suna aiki ne a matsayin cikas na taswirar da zarar an kafa shi wanda ke ci gaba da gudana zuwa bankin da ke gaba, yana haifar da madauki mai kyau. Wannan yana haifar da hanyoyin kogin da ke cikin kogin da ya zama mafi kyau a tsawon lokaci.

 Abubuwan da ke tattare da su 
Abubuwan da aka samo a cikin ƙaurawar tashar kogi sune sanduna, bankunan da aka yanke, meanders, ambaliyar ruwa, da tabkuna.

 Aunawa da kuma samfurin 
Hanyoyin da aka yi amfani da su don auna ƙaurawar tashar kogi sun bambanta tsakanin ma'auni daban-daban. A tsawon lokaci ana amfani da ma'auni, shaidar sedimentological, shaidar botanical, da tushen tarihi. A kan ma'auni na matsakaici, ana amfani da sake dubawa na planimetric da maimaita ribar giciye. A cikin gajeren lokaci, ana amfani da ma'auni na ƙasa da kuma ƙuƙwalwar lalacewa.

Don yin samfurin ƙaura na tashar kogi a tsawon lokaci, ana iya samar da Ayyukan orthogonal na layin hanyar lalacewa don ƙididdigar ma'auni. Ana iya amfani da ayyukan orthogonal don nuna hanyoyin da tashoshin zasu iya ɗauka a cikin ƙaura na gefe. Misali na alamu na meander na iya zama da amfani a aikace-aikace daban-daban na jiki.

 Manazarta 

Rukuni:Koguna