| 林地生态需水量计算方法与应用 |
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| 引用本文： | 张远,杨志峰.林地生态需水量计算方法与应用[J].应用生态学报,2002,13(12):1566-1570. |
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| 作者姓名： | 张远 杨志峰 |
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| 作者单位： | 北京师范大学,环境模拟与污染控制国家重点联合实验室,水沙科学教育部重点实验室,北京,100875 |
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| 基金项目： | 国家重点基础研究发展规划资助项目 (G19990 43 60 5 ) |
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| 摘 要： | 从树木生长强度与土壤水分含量、蒸散量的相互关系出发 ,提出了林地生态需水量的等级标准和
计算方法 ,并以黄淮海地区为例 ,采用ＧＩＳ技术对该地区林地生态需水量进行了估算 ,分析了该地区林地在现状用水状况下的生态缺水量 .结果表明 ,该地区林地年生态需水量约 2 . 56× 1 0 1 0 ～ 4. 58× 1 0 1 0 ｍ3,在满足最小生态需水量要求下林地缺水量约为 2 .8× 1 0 9ｍ3,在满足适宜性生态需水要求下林地缺水量约为8.4× 1 0 9ｍ3.
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| 关 键 词： | 林地 生态需水量 计算方法 应用 蒸散 土壤水分 黄淮海地区 |
| 文章编号： | 1001-9332(2002)12-1566-05 |
| 修稿时间： | 2002年3月15日 |
Calculation method of ecological water requirement for forestland and its application to Huang-Huai-Hai Region |
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| ZHANG Yuan,YANG Zhifeng.Calculation method of ecological water requirement for forestland and its application to Huang-Huai-Hai Region[J].Chinese Journal of Applied Ecology,2002,13(12):1566-1570. |
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| Authors: | ZHANG Yuan YANG Zhifeng |
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| Institution: | Institute of Environmental Sciences, State Joint Key Laboratory of Environment Simulation and Pollution Control, Key Laboratory for Water and Sediment Sciences of Ministry of Education, Beijing Normal University. zhangsongming@263.net |
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| Abstract: | The evapotranspiration and soil moisture content of forestland were studied in relation to free growth. It was found that when the soil moisture content was about 45-100% of field capacity and the actual evapotranspiration came up to 60-100% of potential evapotranspiration, the growth of trees could be sustained. On the basis of our research, the grading standard and calculation method of ecological water requirement of forestland were established. Moreover, the ecological water requirement for forestland in Huang-Huai-Hai are was estimated by GIS technology, and its ecological water shortage was compared to its current water consumption. The results indicated of that the annual ecological water requirement of forestland in Huang-Huai-Hai region was 25.6-45.8 billion m3, and its current water consumption was approximately 2.8 billion m3 below the minimum of ecological water requirement, and 8.4 billion m3 below the optimal ecological water requirement. |
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| Keywords: | Forestland Ecological water requirement Evapotranspiration Soil moisture content Huang Huai Hai region |
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