During recent years practice has changed for ecological reasons and much spoil is now dump ed in special disposal areas offshore, on dry land or in marshes after these areas have been dyked in.

這種方法經(jīng)常用于所有的河段：近年來(lái)美女视频色网站国产，由于生態(tài)的原因av高速在线网站，這種方法已有所改變，淤泥已經(jīng)順傾人海中或陸地上特定的處理場(chǎng)地特级婬片欧美国语高清视频一，或者已圍堤的沼澤免费A片一区二区三区视频。

During recent years practice has changed for ecological reasons and much spoil is now dumped in special disposal areas offshore, on dry land or in marsh es after these areas have been dyked in.

這種方法經(jīng)常用于所有的河段：近年來(lái)，由于生態(tài)的原因五月婷婷久久久，這種方法已有所改變亚洲又黄的A片，淤泥已經(jīng)順傾人海中或陸地上特定的處理場(chǎng)地，或者已圍堤的沼澤。

During recent years practice has changed for ecological reasons and much spoil is now dumped in special disposal areas offshore, on dry land or in marshes after these areas have been dyked in.

這種方法經(jīng)常用于所有的河段：近年來(lái)免费的黄黄网站，由于生態(tài)的原因www.欧美视频，這種方法已有所改變，淤泥已經(jīng)順傾人海中或陸地上特定的處理場(chǎng)地黄页网站网址在线观看，或者已圍堤的沼澤91人人摸人人干人人操。

Based on multi-temporal images and social-economic data, a case study was carried out firstly on Dyked fields (low-lying paddy fields surrounding by dykes) landscape and ditch-net system in Yangzhong City, Yangtze River Delta, using landscape ecological approach.

本文利用多時(shí)段的圖象和社會(huì)經(jīng)濟(jì)資料，以江蘇省揚(yáng)中市為例人人射AV网站，首次從景觀生態(tài)學(xué)角度對(duì)長(zhǎng)江三角洲地區(qū)渠網(wǎng)圩田景觀和渠網(wǎng)系統(tǒng)進(jìn)行了深入。日韩视频在线免费播放。欧美加勒比。