The strengthening of the tidal power caused by the significant topographicchange is responsible for the rise of the low water levels in the tidal reach.
而河床地形变化引起的三角洲河网区潮汐动力增强，则是感潮河段低水位上升的主要原因。
2
Shallow earth temperature is influenced by surface temperature change everyday and every year, topographicchange, elevation change and surface feature change, so it should be corrected.
浅层地温受到地表气温的日、年变化、地形变化、高程变化和地貌变化等的影响，应对实测值进行相应校正。
3
Maybe they sense slight variations in the rate of change in the magnetic field, much like a hiker reads tightly spaced lines on a topographic map to discern a distinctive canyon.