摘要
以桂林岩溶水文地质试验场为研究点,以研究水生植物对岩溶水化学日变化的影响为目的,着重研究水葫芦和水藻对岩溶水的pH、电导率、溶解氧含量、方解石饱和指数以及CO2分压日变化的影响。试验结果表明:在不同水生植物生长的岩溶水中,水化学的日动态变化规律是不同的。在水藻生长的水池出水口处,水的pH、电导、溶解氧含量、饱和指数以及CO2分压所受的影响主要以水生植物的光合作用为主;而在有水葫芦生长的岩溶水中,水生植物的光合作用影响降低,而温度和根呼吸作用的影响增强。在以桂林岩溶水文地质试验场S31号泉水池出水口堰板处和堰板下游约3m处为监测点试验时,试验结果表明其水生植物的影响占70%以上,强于温度作用的影响。
The study aims to reveal the influence of aquatic plants on diurnal variations of karst hydrochemistry. The study spot is situated in the Guilin Karst Experimental Site. It was found that aquatic plants influence the diurnal variations of pH, specific conductivity, dissolved oxygen, and thus the calcite saturation index (SIc) and CO2 partial pressure in water (PCO2) in karst system. However, different aquatic plants show different influences. In the upstream pool at the weir of a spring where there are rich freshwater algae, the most important influence by the algae is photosynthesis. However, in hyacinth planting pool the influence is mainly root respiration of hyacinth and temperature. It is estimated that the influence of aquatic plants can be more than 70% in the total influence, while the temperature influence is lower than 30%.
出处
《中国岩溶》
CAS
CSCD
北大核心
2006年第4期335-340,共6页
Carsologica Sinica
基金
国家自然科学基金项目(编号:40572107)
中科院"百人计划"项目
国家社会公益项目(编号:2005DIB3J067)
关键词
水化学
日动态变化
水生植物
光合作用
根呼吸作用
温度
Hydrochemistry
Diurnal variations
Aquatic plants
Photosynthesis
Root respiration
Temperature