Conspicuously heavier hydrogen and oxygen isotopic compositions in maolouchi river basin after quake suggested that the water source of the rivulet mainly drained from surface runoff subjected to evaporation or the interflow composed with heavier isotopes 猫罗溪流域在地脓后其氢、氧同位素组成明显变重,此意指流至河川之水源可能改变为遭受蒸发作用之地表迳流,或以具较重同位素组成之中间流为主。