gradual formation of new land, by recession of the sea or deposit of sediment
the rising of a body of water and its overflowing onto normally dry land;
"plains fertilized by annual inundations"
clay or silt or gravel carried by rushing streams and deposited where the stream slows down
例句
Effects of N,P,K application and their optimum fertilization parameters for Sinocalamue oldhami in alluvion soil area. 冲积土区域绿竹氮磷钾施肥反应及其最优施肥参数的研究
The sandy soil that upland lime calcium pledges earth and fluvial two sides reach alluvion, sandy loam 4 kinds big. 丘陵石灰钙质土和河流两岸及沙洲的沙土、沙壤土等四大类。
Jet grouting with high pressure is of particular advantage to strengthening of the ground in thick alluvion and soft soil vulnerable to seismic damage. 对震害严重的厚冲积层或厚软土层，用高压喷射注浆法进行加固处理有其独特的优越性。
Original name of city of Home Zhang harbor alluvion county, only then built 1962, by Changshu, Jiang Yin two counties area of part of each lay off incorporates and become. 张家港市原名沙洲县,始建于1962年,由常熟、江阴两县各划出部分地区合并而成。
The spatial differentiation of sediment granularity is controlled by micro-physiography formed by alluvion and deposit swing and by paleoclimate, and by, as well, human’s irrigation from Yellow River. 沉积物粒度表层空间分异与古河流冲积、河床摆动形成的微地貌控制及气候等自然要素有关，也受人类引黄灌溉、抽水灌溉等社会因素影响。
The non-linear finite element analysis for stress-strain of homogeneous dam built in deep alluvion foundation 深厚覆盖层基础均质坝应力变形非线性有限元分析
