construction of wave breaker at glagah beach in yogyakarta with heavy machinery and tetrapod structures in progress

infrastructure sustainability environmental construction geotechnical engineering dissipation development yogyakarta structures excavators breakwater protection management assessment ecosystems morphology machinery equipment excavator tetrapods placement shoreline hydraulic stability aggregate landscape tetrapod progress actively sediment analysis dredging breaker depicts working visible coastal erosion control project glagah cranes marine energy scenic safety beach heavy storm surge urban wave site like rock zone tide land