| 高放废物处置系统地下水同位素特征 |
| 点此下载全文 |
| 引用本文：郭永海,刘淑芬,吕川河.2003.高放废物处置系统地下水同位素特征[J].地球学报,24(6):525-528. |
| DOI： |
| 摘要点击次数: 2535 |
| 全文下载次数: 2357 |
|
| 基金项目:国家自然科学基金项目(4027204)，国防科技预研项目(55.6.23) |
|
| 中文摘要:在高放废物处置库场地特性评价中，对于深地质处置方案而言，最有可能使放射性核素进入生物圈的机制是地下水的迁移，因此，水文地质研究是场址预选和评价中的一个重要内容。本文以甘肃北山预选区旧井地段为例，根据地下水同位素数据，结合所获得的地质、水文数据和信息，分析研究了研究区基岩地下水的起源、形成、演化和循环特征。研究表明，北山预选区旧井地段，深部地下水和浅部地下水均源自大气降水的补给，弱含水、低渗透、低流速是该区的主要水文地质特征。 |
| 中文关键词:土壤营养水平 δ13C 高粱 生物产量 |
| |
| Isotope Characteristics of Groundwater in the Potential Site of a High-Level Waste Repository in China |
|
|
| Abstract:Using the data obtained from experiments conducted in pots, the authors analyzed the conditions of soil nutrient and the relationship between the carbon isotope discrimination in crop and the crop biomass under the condition of different soil nutrient contents. The research has reached the follow conclusions:The nutrient limitation factors are P, N, Mn and Zn, and the order of nutrient deficiency is P>Mn>Zn>N in Xiaojingzi farm soil in Jinchang. P and N fertilizers make up the limitation factors in Huli soil in Wuwei. In Baiyun soil of Wuwei, N, Zn and Mn are the limitation factors, with the order being N>Zn>Mn.The variations of δ 13C values of sorghum leaf and stem in three sorts of soils are as follows: compared with other treatments in these soils, the δ 13C values of OPT treatments are all the highest. The δ 13C values of sorghum in Xiaojingzi farm, Huli and Baiyu are -12.016‰,-12.26‰ and -12.305‰, respectively. These data suggest that under the optimal nutrient condition the plant grows sufficiently and the δ 13C is highest among all treatments. Among all the non-added ample nutrient treatments, the biomasses are dropping with the decreasing δ 13C values,and it seems that nutrient deficiency leads to the decrease of the crop biomass and the δ 13C values. In added treatments, the connection between crop biomass and carbon isotope discrimination is complex. |
| keywords:isotope technique groundwater high-level waste repository |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
