白杨河-艾里克湖水现状分析

根据白杨河、艾里克湖的地表水以及周围地下水的电导率的监测资料,结合不同时期地下水位、土壤水分的变化特点,阐述了地下水埋深和水质的时空分布规律,以及对植被分布的影响.分析结果表明:地下水埋深从白杨河河道至湖岸表现为龙口地带最深、中游河段最浅、入湖口和湖岸居中;土壤水分是湖岸区最高,其次是入湖口,河段中部最低;地表水和地下水电导率的变化均是龙口最低,其次是河段中部,入湖口和湖边最高;在湖区内从湖边到湖心水的电导率依次减小,冰的电导率最低.环湖岸地带,由湖及远地下水位埋深逐渐增加、电导率依次增加、土壤水分依次减少,与其相对应的植被类型依次为芦苇、柽柳苗、柽柳林、盐穗木.同时,研究结果表明艾里克湖将会出现水质盐化趋势,而增加入湖河水水量、疏通排盐通道,促进湖水循环活化是缓解湖水咸化的主要措施.

Water resources in the Baiyang River-Eric Lake basin

The salinities of the surface water and groundwater along the Baiyan River and in the Lake Eric area were measured through the observational method of electrical conductivities (EC) during the period from October 2005 to May 2006. The changes in water salinity have been analyzed together with the data of the groundwater tables and soil moisture observed simultaneously. This paper is put forward to clarify the temporal and spatial distribution of water resources and their effects on the natural vegetation living space. The results show that: (1) The depths of groundwater tables alone the river bank are as follows: the deepest groundwater table appears at Longkou which is in the upper reaches of a section of the Baiyang River, the shallowest one in its middle reaches , and its mediate one at the lakefront and estuary; (2) The lowest EC values along the river exists at Longkou,except for the ice whose water is with its minimum value during the winter season and the highest one at the lakefront and the estuary; Moreover, the EC value of the lake water takes on a decrease trend from the lake beachside towards its center, (3) The zonal vegetation types from the shore to off-shore appear in turn Phragmites Australis, the seelings of Tamarix spp, and Halostachys Caspica, corresponding to the spatial orders of the soil moisture, EC values and groundwater table. Finally, the paper indicates that the salinity of the water in Lake Eric shows an increasing trend, only these measures should be taken to solve this problem: constructing a canal for the salt draining, taking more fresh water into the lake and accelerating lake water circulation.