• Recommendations on other measures. It should be noted that the relative elevations of airfield pavements and the canal system will increase with time due to land subsidence and surface loading conditions, therefore the control levels of the canals should be reviewed, if necessary, additional study should be made. This may not be an urgent matter, but the study may need to be incorporated in the overall dewatering scheme. The airport maintenance team should also take the airfield maintenance seriously. Blockage of canals and drying of grassing areas can have significant impact on the subsurface water level control. It can be seen within the airport at this moment, these maintenance measures have not been implemented, and the maintenance team appeared to focus entirely on the pavement repair instead.