半干旱地区草地生态系统的潜水依赖性模拟
针对半干旱地区复杂的水分条件,从水循环整体的角度出发,通过水循环模拟与植物生长模拟,探索地表植被与潜水的关系。以通辽市平原区的主要植被类型草地为研究对象,选取草地干物质产量作为反映草地植被生长状况的指标,通过分析该指标对降水和地下水变化的响应,阐明地表生态系统对地下水的依赖性。结果表明,枯水年草地生态系统稳定的适宜地下水埋深应在2.0-2.2 m之间;平水年草地干物质产量比枯水年增加13.0%-47.8%,说明降水是影响半干旱地区生态系统稳定的重要因素;无潜水支持条件下,枯水年的草地干物质产量比多年平均值减产11.0%-14.7%,而平水年仅减产3.8%-5.9%,可见降水的丰枯变化影响着草地...
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| Published in | 农业工程学报 Vol. 29; no. 22; pp. 118 - 127 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
河北工程大学水电学院，邯郸 056021
2013
中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室,北京,100038%中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室，北京 100038 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.3969/j.issn.1002-6819.2013.22.014 |
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| Summary: | 针对半干旱地区复杂的水分条件,从水循环整体的角度出发,通过水循环模拟与植物生长模拟,探索地表植被与潜水的关系。以通辽市平原区的主要植被类型草地为研究对象,选取草地干物质产量作为反映草地植被生长状况的指标,通过分析该指标对降水和地下水变化的响应,阐明地表生态系统对地下水的依赖性。结果表明,枯水年草地生态系统稳定的适宜地下水埋深应在2.0-2.2 m之间;平水年草地干物质产量比枯水年增加13.0%-47.8%,说明降水是影响半干旱地区生态系统稳定的重要因素;无潜水支持条件下,枯水年的草地干物质产量比多年平均值减产11.0%-14.7%,而平水年仅减产3.8%-5.9%,可见降水的丰枯变化影响着草地的潜水依赖程度。 |
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| Bibliography: | 11-2047/S ecology; rain; hydrology; grassland; phreatic water; dry matter yield; semi-arid regions Sun Qingyan, Lu Chuiyu, Luan Qinghua, Li Hui, Wang Lin （1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 2. School of Water Conservancy and Electric Power, Hebei University of Engineering, Handan 056021, China） In semi-arid areas, human activity is more frequent than in arid areas, which makes groundwater exploitation more severe, while there is more precipitation relative to dry areas, which increases the complexity of the moisture conditions. For the complex water conditions in the semi-arid regions, the relationship between vegetation and phreatic water was explored by water cycle simulation and plant growth simulation from the perspective of the whole water cycle. The grassland, the main land use/cover types in Tongliao plain areas, and the grass dry matter yield（DMY）, an indicator reflecting gr |
| ISSN: | 1002-6819 |
| DOI: | 10.3969/j.issn.1002-6819.2013.22.014 |