Ayyukan ruwa

Ayyukan hydraulic, mafi yawanci, shine ikon motsa ruwa (gudu ko raƙuman ruwa) don fitarwa da jigilar barbashi na dutse. Wannan ya haɗa da wasu takamaiman matakai na rushewa, gami da Abrasion, a sauƙaƙe rushewa mai sauƙi, kamar rushewar tsaye inda ruwa ke fitar da gishiri kuma yana iyo daga kayan kwayoyin halitta daga abubuwan da ba a haɗa su ba, kuma daga rushewar sinadarai galibi ana kiranta yanayin sinadarai. Tsarin inji ne, wanda ruwan da ke motsawa ke gudana a kan bankunan da kuma gado na kogi, don haka yana cire barbashi na dutse. Misali na farko na aikin hydraulic shine raƙuman ruwa da ke buga fuskar dutse wanda ke matse iska a cikin fashewar duwatsu. Wannan yana matsa lamba a kan dutsen da ke kewaye da shi wanda zai iya ci gaba da fashewa, fashewa da rarraba ƙwayoyin dutse. Wannan ya biyo bayan raguwar iska yayin da raƙuman ruwa suka koma baya wanda zai iya Yaduwa ba zato ba tsammani tare da ƙarfin fashewa wanda kuma ya raunana dutsen. Ana fadada fashewa a hankali don haka kowane guguwa yana matsa ƙarin iska, yana ƙara ƙarfin fashewa na sakin sa. Don haka, tasirin yana ƙaruwa a cikin tsarin 'ra'ayi mai kyau'. Bayan lokaci, yayin da tsagewa na iya girma wani lokacin suna samar da kogon teku. Kashewar da suka fadi suna haifar da ƙarin nau'ikan lalacewa guda biyu, abrasion (sandpapering) da raguwa. A cikin corrasion, ana jefa sabbin ɓangarorin da aka kafa a kan fuskar dutse. Rashin ƙarfi irin wannan sakamako ne wanda ya haifar da barbashi bayan sun faɗi cikin teku inda aka ci gaba da aikin raƙuman ruwa. A yankunan bakin teku aikin ruwa na ruwa sau da yawa shine mafi mahimmancin nau'in rushewa.
Hakazalika, inda aikin hydraulic ya isa ya saki laka tare da gado na rafi da bankunan sa; wannan zai ɗauki duwatsu da barbashi daga bankunan da gado na kogin kuma ƙara wannan ga nauyin rafi. Wannan tsari shine sakamakon rikice-rikice tsakanin ruwa mai motsi da gado mai laushi da bankunan. Wannan rikici yana ƙaruwa tare da saurin ruwa kuma da zarar an saki ƙananan barbashi ana riƙe su a cikin dakatarwa ta hanyar ƙarfin ruwa mai gudana, waɗannan barbashi da aka dakatar na iya share bangarorin da ƙasan rafin. Ayyukan tsaftacewa suna samar da alamomi na musamman a kan gadajen rafi kamar alamun ripple, fluting, da alamun crescent.Coja Isabelle and Renard, Maurice (2002) Sedimentology (translation of Sédimentologie from French) Lisse, Exton, Pennsylvania, pages 143–144,  Ana cire manyan barbashi har ma da manyan duwatsu (ja) tare da kasa a cikin wani tsari da aka sani da traction wanda ke haifar da raguwa, kuma galibi ana "buɗewa" tare da wani tsari da ake kira saltation inda ƙarfin ruwa na ɗan lokaci ke ɗaga barbashi na dutse wanda sa'an nan ya fadi cikin gado yana fitar da wasu barbashi.

Ayyukan ruwa kuma yana faruwa yayin da rafi ya rushe a kan faduwar ruwa don ya fadi a kan duwatsu da ke ƙasa. Yawancin lokaci yana haifar da samar da tafkin nutsewa a ƙarƙashin faduwar ruwa saboda wani bangare na lalata daga nauyin rafin, amma mafi yawa ga aikin tsaftacewa yayin da vortices ke cikin ruwa yayin da yake tserewa daga ruwa. Ayyukan ruwa na iya haifar da rushewar koguna tunda akwai kumfa na ruwa wanda ke shiga bankunan kuma ya rushe su lokacin da suka fadada.

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