fluvial marsh

Test results show that the roughness of floodplain and turbulence of flow increase after flexible vegetation is planted in the floodplain of the waterway with a compound section,and that turbulence intensity peak is transferred to the floodplain from the intersection between the floodplain and the main channel.

试验结果表明,在复式断面河道滩地种植柔性植被后,滩地糙率增大,水流紊动更为剧烈,河道水流紊动强度峰值由原先的滩槽交界区转移到滩地区。

This paper analyzes the mechanism of momentum transfer of the flows between main channel and floodplain.

探讨了复式断面渠道中主河槽和滩地之间水流的动量传递机理，应用动量定理导出了计算复式断面渠道中恒定均匀流的公式，并与实验资料吻合较好，从而证实了理论分析成果。

Study on the afforestation of Poplus and the species diversity of herb in beach of Dongting Lake;

洞庭湖滩地杨树造林与草本植物物种多样性研究

Study on the hydrographic situation of the Dongting Lake beach and the selection methods of poplar afforestation area;

洞庭湖滩地水文状况与杨树造林地选择的研究

The final cutting age of different density poplar plantation in beach;

滩地不同密度杨树人工林主伐年龄的研究

Studies on multi-storied mixed forest types on beach land and its benefit;

滩地复层混交群落类型及其生长效益

The result shows that the size of the stand crown cover performs negative correlation with the density of Oncomelania hupensis on the beach land.

林分郁闭度大小是改变林下生态环境的主导因素,通过对林下草本植物分布变化以及林下温度、湿度、光照及地下水位等因子的调查分析研究,结果表明:滩地林分郁闭度大小与钉螺密度呈负相关关系。

This study focused on the vegetation in Yangtzi River beach land along Ezhou in Hubei province.

本文以湖北鄂州长江外滩植被为研究对象 ,对滩地植物群落的基本特征及多样性指数相关性进行分析。

Debris flow waste-shoal land which has a smooth terrain and good moisture and temperature condition is a soil resource in the debris flow area.

泥石流滩地是泥石流地区地势平坦、水热条件较好的土地资源 ,对它的开发利用有助于改善泥石流地区的环境状况。

Since1 983,a set of the observation reseaches on the modern debris flow waste- shoal land in Jiangjia Ravine have been carried out,and have decided the utilizability of debris flow waste-shoal land resource.

198 3年以来对云南蒋家沟近代泥石流滩地进行了一系列观测研究 ,确定了泥石流滩地的可用性 。

s On the seasonal beaches,density of the surviving oncomelania( Y ) and the occurring rate of oncomelania ( Y r) are significantly related with the underground water table ( X 1) and the soil water content ( X 2).

长江中下游滩地钉螺的分布与滩地的地下水位关系显著，当地下水位为３２ｃｍ左右时，钉螺密度和有螺框出现率分别达到其最大值。