Mario de Leon

• PhD in Engineering
• Professor (Associate) at De La Salle University

Coastal erosion has been affected by environmental factors and human development. The investigation of the coastal erosion in San Juan, La Union covers the analysis and quantitative data that can be applied to protect the coastal community, to minimize economic losses, and to plan for the improvement of coastal process response. The main objective...

Sediment compatibility refers to the sediments ability to perform well compared to that of the native sand. It is often based on the granulometric similarity of the sand originally present in the beach and the sand that is used in the beach nourishment.Various methods are used to obtain this compatibility and the method used in the study is the med...

Typhoon Haiyan (Yolanda) struck the islands of Leyte and Samar, the central part of the Philippines, on 8 November 2013, bringing large-scale devastation to coastal areas due to the high winds and large storm surge and waves associated with it. In order to obtain the distribution of storm surge heights and damage covering the wide stretch of affect...

Category 5 Typhoon Haiyan was one of the strongest typhoons to hit the Philippines in modern times, and introduced the term “storm surge” to the vocabulary of many local residents, who had not heard about such phenomena prior to this event. The storm surge manifested itself on the 8th November 2013 as Haiyan made landfall, devastating large areas i...

Offshore sand minig for the construction and beach nourishment purposes has been conducted in subtropical and tropical islands in Kagoshima and Okinawa prefectures. Sand mining is usually conducted in an aeria deeper than the critical water depth for sediment movement. However, environmental concirns such as a cause of beach erosion might be expres...

Wave transformation describes the propagation of waves and water surface displacement from offshore to onshore. The magnitude of wave generation and wave setup are dependent on a number of factors such as wind speed, water depth and tide level. This paper has investigated the characteristics of wave transformation in Manila bay along Roxas boulevar...

The present chapter describes the characteristics of the massive storm surge generated by the 2013 Typhoon Yolanda (Haiyan), which made landfall on the coast of the Philippines on November 2013. The authors conducted a series of field surveys and numerical analysis in Leyte and Samar Islands in the aftermath of the disaster in order to understand t...

Category 5 Typhoon Haiyan (known as Yolanda in the Philippines) made landfall in the Philippines on the 8 th November 2013 at almost the peak of its power, devastating the islands of Leyte and Samar, amongst other places. The present paper analyses the degree of awareness and preparedness of the islands of Samar and Leyte in the Philippines against...

Category 5 Typhoon Haiyan (known as Yolanda in the Philippines) made landfall in the Philippines on the 8 th November 2013 at almost the peak of its power, devastating the islands of Leyte and Samar, amongst other places. The present paper analyses the degree of awareness and preparedness of the islands of Samar and Leyte in the Philippines against...

The authors have examined the characteristics of Typhoon Haiyan (Yolanda), which made landfall on the coast of the Philippines on November 2013, generating a substantial storm surge. In order to better understand the storm surge phenomenon, its nature and severity were analyzed by means of a numerical simulation and a field survey. Unlike most othe...

In November 2013, Typhoon Yolanda (Haiyan) struck the central part of the Philippines and caused severe damage to coastal areas due to storm surge and strong wind. In this paper, the results of the field survey conducted one month after the disaster were summarized. Storm surge heights were more than 5 m along the inner part of Leyte Gulf, and seve...

Typhoon Yolanda made landfall in Leyte Island at near peak strength, with maximum sustained wind speeds of 160 knots, the largest in the recorded history of the Western North Pacific. Yolanda ap-proached very quickly with a forward speed of 41km/hr towards Leyte, which was also the largest among typhoons with similar intensities. As a result of the...

Hard engineering approaches such as seawalls, groins, detached and submerged breakwaters to stabilize or restore beaches are used to counteract beach erosion. However, none of these shore protection structures adds more sand to the beach system to compensate for natural and artificial erosion. Thus, beach nourishment, also called "artificial nouris...