Beaver-engineered dam in the Czech Republic

## Tushe
Fage Yankin Brdy, wanda ke kudu da Prague, ya shafi tsarin magudanar ruwa ta wucin gadi da Gundumar Soja ta Brdy [cs] ta kafa, wanda ke haifar da lalata muhalli. Shekaru da dama da suka gabata, sojoji sun tono magudanan ruwa don yashe ruwa daga doron kasa, inda suka mai da dausayi zuwa busasshiyar wuri.[1][2] A cikin 2016, an kafa yankin Brdy Kariyar Yanayin Kasa [cs] a madadin gundumar soji da aka soke da wasu wuraren da ke kewaye.[4][5] Gane lalacewar muhalli, hukumar Brdy ta ba da kariya ga yanki mai faɗin ƙasa ta tsara shirye-shirye a cikin 2018 don gina ƙananan madatsun ruwa don maido da dausayi da kuma kare kogin Klabava daga gurɓataccen ruwa da gurɓataccen ruwa na acidic wanda ya samo asali daga tafkunan da ke kusa.[6] Sai dai, cikas na ofis, rigingimun mallakar filaye da ba a warware su ba, da kuma matsalolin kuɗi sun haifar da tsaiko wajen aiwatar da aikin.[7]
## Beaver Construction
A farkon 2025, dangin Eurasian beavers (Castor fiber) bisa dabi'a sun gina jerin madatsun ruwa a wurare iri ɗaya inda aka yi niyya da abubuwan da ɗan adam ya tsara.[8] Beavers sun yi amfani da itace, laka, da duwatsu don ƙirƙirar tsarin da ke rage magudanar ruwa da kuma maido da yanayin dausayi. Wannan yunƙurin maidowa da aka yi ba zato ba tsammani ya haifar da bunƙasa yanayin muhalli, yana amfana da namun daji kamar su dutse crayfish, kwadi, kwari masu ruwa da ruwa, da nau'in tsuntsayen da suka dogara da wuraren zama na dausayi.[6] Masana sun lura cewa beavers injiniyoyi ne masu ƙwaƙƙwaran da ke da ikon canza yanayin ƙasa don tallafawa riƙe ruwa da bambancin halittu. Ayyukansu na taimakawa wajen daidaita kwararar ruwa, rage zaizayar ƙasa, da inganta tace ruwa, yana mai da su masu ba da gudummawa mai mahimmanci ga lafiyar ciyayi. Dam din da aka yi da beaver a Brdy ba wai kawai ya sake haifar da dausayi mai aiki ba har ma ya ba da fa'idodi na dogon lokaci ta hanyar rage haɗarin ambaliya, hana tasirin fari, da kuma kiyaye daidaitaccen yanayin muhalli.[1][9]
## Amsa da Ganewa
Hukumomin kiyaye muhalli na Czech sun yaba wa beavers saboda aikin da ba zato ba tsammani amma mai tasiri na muhalli. Bohumil Fišer, shugaban yankin Brdy Kariya, ya bayyana cewa "dabi'a ta ɗauki hanya", [2] kuma beavers sun sami sakamakon da ake so a yanayin muhalli "a zahiri na dare ɗaya". Kiyasin tanadin kuɗin da aka yi wa gwamnatin Czech ya kai miliyan 30 na Czech koruna (dalar Amurka miliyan 1.2), yayin da aka kammala aikin ba tare da aikin ɗan adam ko tallafi ba.[10] Masanan dabbobi da masana muhalli sun jaddada faffadan mahimmancin taron, inda suka karfafa matsayin beavers a matsayin "masu aikin injiniyan muhalli".[11] Wannan shari'ar ta ba da gudummawa ga haɓaka tattaunawa a Turai game da fa'idodin shirye-shiryen rewilding na beaver, musamman a yankunan da ayyukansu ke tallafawa sarrafa ambaliyar ruwa, kiyaye ruwa, da kuma maido da mazauninsu[1]. Yankin Brdy beaver wani bangare ne na sake farfado da yawan jama'ar beaver na Eurasian a cikin Jamhuriyar Czech, tare da kididdigar da ke nuna kusan mutane 15,000 a duk fadin kasar.[7] Yayin da beavers na iya haifar da rikice-rikice a wasu lokuta ta hanyar sare bishiyoyi ko kuma ambaliya filayen noma, jami'ai sun lura cewa wurin na Brdy yana da nisa da filayen noma, wanda hakan zai iya yin zaman tare na dogon lokaci tare da beavers[12]. Hukumomin sun yi hasashen cewa babu wani gagarumin rikici da yankin beaver na aƙalla shekaru goma masu zuwa.[13]