A - alluvion 中文 - EN166

alluvion n.1.波浪的沖擊。2.泛濫，洪水。3.【法律】(沖積造...

alluvium
Based on 2m contour of surveyed bathymetry from 1976 to 1999 and mean - high - tidal line distracted from remote sensing images acquired by landsat - 5 tm from 1976 to 2000 respectively , quantitative analysis about alluvion and erosion as well as the relationship between accretion of modern yellow river delta and the water and sediment discharge of yellow river is made , and the results indicate the mean - high - tidal level is more effective than 2m contour of the bathymetry . it is found that the accretion of modem yellow river delta is becoming less and less , what ' s more , erosion is even more than alluvion in some recent years . diaokou promontory has been eroded seriously since yellow river changed its course in1976 以一般高潮線反映現代黃河三角洲沖淤演變時，從1976年黃河改道清水溝流路入海到2000年，整個黃洞三角洲凈造陸201 . 5km ~ 2 ，淤積有逐漸變慢的趨勢，甚至出現凈蝕退的年份；刁口河嘴大量蝕退，蝕退速率開始快速，后來逐漸變慢；清水溝河嘴大量淤積，淤積速率開始迅速，后來逐漸變慢，甚至出現凈蝕退；清水溝河嘴南側到支脈溝一段岸線與刁口河嘴以西到灣灣溝一段岸線基本穩定。
A statistical model is developed and indicates high correlation between the accretion of modem yellow river delta and the water and sediment discharge of yellow river , and the model shows the necessary water and sediment discharge per year to ensure the equilibrium of alluvion and erosion of yellow river delta 黃河三角洲凈造陸面積與黃河入海水沙量的統計模型說明，黃河三角洲沖淤動態平衡時的黃河入海徑流量為71 . 93億m ~ 3 a ，輸沙量為1 . 853億t a 。
Some factors affecting the alluvion and erosion of the yellow river delta are given and analyzed , including human activities , global warming and sea level rise , deep structure , deposits in the delta , local climate , some ocean factors such as current , wave , tide 此外，本文還分析了地質構造、沉積相和沉積物、氣象條件、海洋動力、海平面升高、人類活動等因素對黃河三角洲的沖淤演變的影響。