Is this more similar to the spring-flow tunnel, or the Persian qanat? https://en.wikipedia.org/wiki/Qanat#Qanat_vs._spring-flow_tunnel https://en.wikipedia.org

Is this more similar to the spring-flow tunnel, or the Persian qanat? https://en.wikipedia.org/wiki/Qanat#Qanat_vs._spring-flow_tunnel https://en.wikipedia.org/wiki/Qanat#Qanat_vs._spring-flow_tu...