【摘要】 20世纪后期黄河入海口的径流量减少和多次断流,这对流域下游地区的经济发展、尤其是农业产生明显影响。特别应注意的是,与径流量减少的同时,输沙量也明显减少,致使20世纪90年代以来入海口造陆面积锐减,在1996年和1997年甚至造陆停滞、出现海侵。黄河入海口的径流量、输沙量减少可能引发的一系列生态环境问题中,造陆面积的减少和海水的侵入可能关系到黄河三角洲的经济发展前途,近期则危及胜利油田的安全,应引起有关部门的关注。文中还探讨了用地球物理测井方法检测生态环境的变化。更多还原

【Abstract】 The estuary runoff of the Yellow River decreased during the late 20th century and its lower course became dry many times. Besides its obvious effect on ecology development and especially on agriculture production, special attention should be paid to the fact that the amount of transported sediments also decreased obviously along with the runoff decreasing thus leading to the sharp reduction of continent-building area of the estuary since the 1990s. The continent-building stopped and marine transgression occurred during 1996 and 1997. Among a series of ecological environmental problems resulted from the decreasing of estuary runoff and amount of transported sediments of the Yellow River, the decreasing of continent-building area and the transgression of ocean water may be related with the future of the Yellow River Delta and may endanger the safety of the Shengli Oilfield at present. Thus a great attention should be paid. Checking the changes of ecological environments by geophysical logging techniques is also discussed in the paper.更多还原