📋 Tender Overview
Technical report from the Geophysical Institute of Peru IGP has allowed calculating the area of the landslide that occurred in Achoma on June 18. This document also includes a digital reconstruction of a possible flood due to the Colca river impoundment and the determination of an unstable area in the Maca district that could lead to future landslides.The Geophysical Institute of Peru IGP published the technical report Geophysical evaluation of the landslide that occurred on June 18 2020 in the Achoma district. This scientific document details that the unstable area prior to the landslide was 36.4 hectares which once slid occupied an area of 53 hectares approximations obtained from the analysis of radar images.According to the numerical simulations carried out by the IGP the Achoma landslide reached speeds of 8.5 m s within 10 seconds of the start of the event. The material was completely deposited in 3 minutes which caused the dam of the Colca river. As of July 13 2020 the volume of dammed water was greater than 8 million cubic meters.UNLOADING SCENARIOThe IGP has reached this technical-scientific report to the authorities of SINAGERD and the Arequipa region. The document includes a digital reconstruction of a possible flooding scenario generated by an uncontrolled impoundment which if it occurs would reach a maximum height of 12 meters however this would not represent a greater danger for the populations of the districts of Ichupampa Maca and Lari.UNSTABLE AREAS IN THE COLCA VALLEYThe radar interferometry technique has proven to be a useful tool for identifying critical slip zones. With it the IGP has determined a critical area located on the left bank of the Colca River in the Maca district opposite the area where the Lari landslides occurred in 1955 and 2013.Once this area has been identified the SINAGERD authorities within the framework of their competences must carry out the respective field evaluations. In the case of the IGP a study will be scheduled to evaluate the dynamic behavior of the soils in this area which will be essential to adopt prevention and or mitigation measures says Dr. Hernando Tavera Executive President of the IGP.
