中文摘要：

提出了基于层次全息模型（HHM）框架识别农业土地利用环境风险的方法：通过构建农业土地利用环境风险识别的HHM框架，从多维度描述农业土地利用过程中存在的9大类别风险源，并应用双重标准风险矩阵方法对各类别风险源进行初步筛选、过滤和分级；在此基础上，依据多重准则标准和定量化风险矩阵进一步对各个环境风险因子进行定量评估。以湖南省桃江县为例，应用HHM风险识别方法对该县农地利用的环境风险进行系统识别，结果表明桃江县农地利用的主要环境风险源包括重金属污染、水体富营养化、污水灌溉和工厂排污。

英文摘要：

Hierarchical holographic modeling （HHM） method was applied to analyze and identify environmental risks of agricultural land uses from the perspective of land use system. Through creating HHM framework for environmental risk i- dentification of agricultural land use, 9 major groups of risk sources were described from a multiple dimensional angle, and screened, filtered and graded using a dual-standard risk matrix. On such a basis and the multi-criterion standard and quantitative risk matrix, the various environment risk factors were further evaluated quantitatively. In the end, Taojiang County of Hunan Province was selected as a case for study, and environmental risks of the agricultural land use of the county were systematically identified using the HHM method. Results show that heavy metal pollution, water body eutroph- ication, sewage irrigation and factory pollution discharge are the primary environmental risks of the agricultural land use in the study area, to which more attention should be paid in environmental risk warning and prevention.