5.3 Field survey and damage assessment
The field survey on previous flood impacts and HMS vulnerabilities show that the previous flood has damaged the HMS in Ayutthaya. To conserve those HMS, it is important to assess the damage in terms of environmental, external and internal damage. The levels of damage: high risk, medium risk and low risk respectively, are also assigned. The results are shown in Table 7. Furthermore, the historic monument values are ranked as high, medium or low values.