Sediment in the lower yellow river irrigation is mainly treated with warping and improvement of saline - alkali soil , low and waste lands , which plays an important role in improving the ecological environment and developing the agricultural production in the areas by two banks of the lower yellow river 黄河下游引黄灌溉中的泥沙主要采取放淤改土、改造低洼盐碱沙荒地，对黄河下游两岸发展工农业生产、改善生态环境，起到了重要作用。
2.
A large area of bare sandland distributed in beijing and its surrounding areas is one of sand source areas which contributes to high - frequent sand storms in beijing in recent years , whereas increasing of surface coverage condition is one of effective measures to lessen local blown - sand activities 摘要北京及其周边地区分布的大量裸露沙荒地是北京近年来沙尘暴频发的主要沙源之一，而增加其地表覆盖状况则是遏止就地扬沙起尘的有效措施之一。
