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1981年7、8月间,陕西省南部地区连降大雨、暴雨,致使山洪暴发,广大山区引起了强烈的水土流失,泻溜、滑塌、山崩、泥石流等普遍发生,给山区和平川均造成历史上罕见的灾情。陕南地区近年来水灾频繁,去年的洪水又造成如此严重的灾害,原因是多方面的:有自然方面的原因,如秋雨时间长、雨量多、强度大,这是致灾的直接原因;也有江河治理缺乏统一规划,工程质量不高等问题。但是,从宏观现象来看,现代人们生产活动的盲目性,到处开荒扩种,滥砍滥伐,破坏了生态平衡,造成了强烈的水土流失(现代侵蚀),是加剧降雨成灾的重要因素。在一定程度上讲,陕南地区水灾频繁,灾情越来越严重,主要是水土流失的严重恶果。
In July and August 1981, heavy rains and torrential rains continued in the southern part of Shaanxi Province, causing flash floods. The vast mountainous areas caused intense soil erosion, causing diarrhea, landslide, landslide and debris flow to occur in the mountains and Hirakawa A rare disaster in history. The floods in southern Shaanxi have been frequent in recent years. Last year’s floods caused such a serious disaster again. There are many reasons for this. There are natural causes such as long autumn rains, heavy rainfall and high intensity, which are the direct causes of disaster. There are also The lack of a unified river control planning, project quality is not high and so on. However, judging from the macroscopic phenomenon, the blindness of modern people’s production activities, the expansion of wasteland, the deforestation, the destruction of the ecological balance and the intense erosion (modern erosion) are the important factors that aggravate the rains and catastrophes . To a certain extent, the floods in southern Shaanxi are frequent and the disaster is getting worse and worse, which is mainly the serious consequence of soil and water loss.