2. PRESENT VULNERABILITY AND COPING CAPACITY Province of Albay has two major problems and issues over the land, urban expansion and natural calamity: eruption of Mayon Volcano and typhoon and flood. The area covered by the mud & debris flow by the eruption of Mayon Volcano becomes sand & gravel area, classified as the idle & vacant area, and has not been utilized for any purpose except quarrying. This issue and the urban expansion cause the decrease of agricultural land. These issues and frequent typhoon and flood makes agricultural activity unstable and cause the low self-sufficiency.
Problem Structure over the Land
Urban Expansion Natural Calamity (1) Eruption of Mt. Mayon (2) Typhoon & Flood
Land Conversion Mud & Debris Flow Takings cost & time to recover
Decrease in Agricultural Land
Unstable Agricultural Activity
Difficulty to achieve the Self-sufficiency
According to DENR, municipalities and the aerial photographs (1982, 1999), land, including agricultural area, which has once been covered by mudflow, becomes the sand & gravel area and classified as an idle and vacant land. There is no financial or physical assistance or aid for the disaster-stricken land. Each municipality has the rehabilitation plan over the eroded area especially for coconut and abaca, however, it is not progressing so much due to the financial problem.
3. LAND USE PLAN 3.1 Basic Concept To improve the coping capacity, two major concepts are proposed for Land Use Plan, the improvement of productivity and the prevention of area decrease for agriculture. For each concept, the plan stated below is proposed. a. Prevention of Area Decrease for Agriculture - Sabo Project (Refer to the Sabo Planning as a detail) with Resettlement Plan b. Improvement of the Productivity - Agricultural Development Plan - Livelihood Development Plan
IV - 26 3.1.1 Hazard Zone (1) Basic Concept of Hazard Zone for Land Use The Permanent Danger Zone (PDZ) of Mt. Mayon designated by the PHIVOLCS is the area extending 6km downward from the volcano’s summit. Also PHIVOLCS sets up the High Danger Zone (HDZ), which is the area between 6km and 10km downward from the volcano’s summit. The basic idea of zoning of the danger zone for Land Use is provided as follows. The Area A is the original idea of the Permanent Danger Zone (PDZ) designated by PHIVOLCS, which is a 6km circular zone from the center of Mayon Volcano. This area might be immediately affected by the lava & pyroclastic flow as the eruption, which has no promising countermeasures for the prevention. In this area, according to the PDMO and the interviews of the related barangays, 440 households and 2,640 estimated number of people are resided and 4,087 people have the farming activity in this area. Those households must be resettled in the other safer area with provision of new farming area or new job opportunity. The Area B is the doughnut around the Area A between 6 - 8km from the center of Mayon Volcano. This area is the High Danger Zone (HDZ), which might be affected by pyroclastic, debris and lahar mudflows accompanying floods, which are expected to occur sooner or later after the eruption. In this area, however, there are some possibilities to train & mitigate. The Infrastructural Prevention & Mitigation will be indispensable as the countermeasure, which must be combined with the Warning System and Evacuation Activity. The Area C is the Cautious Zone (CZ) around the Area B, in which the countermeasure will be Warning System and Evacuation Activity. In the Area B (HDZ), some part should be classified as the Area A’, which is categorized same as the Area A. In the actual cases, it is said that the pyroclastic flow and lahar extended to the seashore partially in Sto. Domingo and Legazpi City, which is about 12km from the summit. The rivers and creeks around the Mayon lead the flow farther down. These concerning rivers and creeks havebeen carefully identified.
IV - 27 Concept Matrix of Basic Idea of Zoning around Mayon Volcano
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