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：近年來亚洲伊人成无码91，由于生態(tài)的原因台湾三级片电影AAAA，這種方法已有所改變日本、乱论、欧美、国产，淤泥已經(jīng)順傾人海中或陸地上特定的處理場地，或者已圍堤的沼澤色色综合五月。

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91AV免费视频，由于生態(tài)的原因，這種方法已有所改變欧美AAAA级精品a片，淤泥已經(jīng)順傾人海中或陸地上特定的處理場地3a级黄色视频，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，由于生態(tài)的原因色呦呦.m3.u8，這種方法已有所改變国产综合视频在线观看，淤泥已經(jīng)順傾人海中或陸地上特定的處理場地，或者已圍堤的沼澤综合网网。

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.

本文利用多時段的圖象和社會經(jīng)濟(jì)資料国产www.，以江蘇省揚(yáng)中市為例，首次從景觀生態(tài)學(xué)角度對長江三角洲地區(qū)渠網(wǎng)圩田景觀和渠網(wǎng)系統(tǒng)進(jìn)行了深入A片线观视频费网址。日本电影黄色。。