Rushewar takarda

Rushewar takarda ko wanke takarda har ma da rushewar tushe tare da yanki mai faɗi. Yana faruwa a wurare masu yawa kamar Filayen bakin teku, gangaren tsaunuka, Filayen ambaliyar ruwa, rairayin bakin teku, filayen Savanna da filayen tsaka-tsaki. Ruwa yana motsawa daidai tare da irin wannan kauri a kan farfajiya ana kiransa kwararar takarda, kuma shine dalilin lalacewar takarda. Rushewar takarda yana nuna cewa duk wani kwararar ruwa da ke haifar da rushewar ba a sarrafa shi ba. Idan farfajiyar tudun ta ƙunshi abubuwan da ba daidai ba da yawa, rushewar takarda na iya ba da damar rushewa tare da ƙananan tashoshin da ake kira rills, wanda zai iya haɗuwa don samar da gullies. Koyaya, lalacewar takarda na iya faruwa duk da wasu iyakancewar rashin daidaito a cikin takardar da ke fitowa daga ƙuƙwalwar ƙasa, raguwar dutse, ko ciyayi.

Rushewar takarda yana faruwa a matakai biyu. Da farko, ruwan sama yana fitar da ƙananan barbashi na substratum sannan kuma ana ɗaukar barbashi, yawanci gajeren nesa, ta hanyar ruwa mai laushi da daidaituwa (ruwan takarda). "Sheet erosion – Britannica Online Encyclopedia". Britannica.com. Retrieved 26 September 2018. Sufuri ta hanyar yaduwar takarda yawanci a kan ƙananan nisan, ma'ana cewa lalacewar takarda tsari ne mai ƙarancin girma. Koyaya, mitar a tsawon lokaci wanda wannan ke faruwa na iya zama babba, yana biyan kuɗi ga ƙaramin canji da aka lura a kowane ɓangaren ɓarkewar takarda. Ana iya rarrabe takardar ruwa daga kwararar takarda ta yau da kullun ta hanyar girmansa mafi girma da ƙaramin mitar. Masana kimiyya daban-daban sun haɗa ambaliyar ruwa tare da dalilai da yawa, gami da ruwan sama mai ƙarfi, ƙarancin taimako, rashin ciyayi, ƙaranci na substratum, bambancin yanayi mai ƙarfi tsakanin yanayi, nau'in gangara da Canjin yanayi. Sheetfloods yawanci suna da rikici yayin da sheetflow na iya zama laminar ko turbulent.

Rushewar takalma ya zama ruwan dare a cikin filayen da aka noma kwanan nan da kuma ƙasa mai laushi inda ba a karfafa tushe ba, yawanci ƙasa."Sheet erosion – Britannica Online Encyclopedia". Britannica.com. Retrieved 26 September 2018. Sakamakon asarar kayan ta hanyar rushewar takarda na iya haifar da lalacewar ƙasa mai daraja. ciyawa mai kauri, kamar Vetiver, yana hana ci gaban kwararar takarda. Rushewar takardar da ruwan sama guda daya ya haifar na iya haifar da asarar har zuwa tan ɗari na ƙananan barbashi a cikin acre.

An yi jayayya cewa a ƙarshen Neoproterozoic Era, lalacewar takarda ya kasance babban tsari ne na lalacewa saboda rashin tsire-tsire a ƙasa. Saboda haka, lalacewar takarda na iya ba da gudummawa ga tsara muhimman siffofi kamar yankin Sub-Cambrian wanda ke rufe yawancin Baltic Shield.

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