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| 石羊河流域天然植被适宜生态需水量估算 | |
| 引用本文： | 陈乐,张勃,任培贵. 石羊河流域天然植被适宜生态需水量估算[J]. 水土保持通报, 2014, 0(1): 327-333 |
| 作者姓名： | 陈乐 张勃 任培贵 |
| 作者单位： | 西北师范大学地理与环境科学学院, 甘肃兰州 730070;西北师范大学地理与环境科学学院, 甘肃兰州 730070;西北师范大学地理与环境科学学院, 甘肃兰州 730070 |
| 基金项目： | 国家自然科学基金项目"水资源约束下的黑河流域土地利用/覆盖变化模拟研究"(40961038);生态经济学省级重点学科项目(5001-021);西北师范大学知识与科技创新工程项目(NWNU-KJCXGC-03-06) |
| 摘 要： | 基于遥感手段并运用ArcGIS 9.3软件统计获得石羊河流域1987,2000及2010年3期各类型天然植被面积数据,采用阿维里扬诺夫估算方法对石羊河流域各县区天然植被的生态需水量进行了估算。结果表明,石羊河流域1987,2000及2010年天然植被适宜生态需水量分别为2.43×109,2.34×109,2.06×109 m3,其中各县区天然植被适宜生态需水量由多到少依次为:肃南县> 天祝县> 永昌县> 民勤县> 古浪县> 凉州区> 金川区。石羊河流域林地、草地的生态需水量基本各占总需水量的1/2,但各县区林地、草地生态需水量的百分比差异明显,流域天然植被的水分利用率介于2.74~16.55 kg/(hm2·mm)。通过对石羊河流域3期天然植被适宜生态需水量的研究发现,流域天然植被无论从总需水量还是各优势盖度的需水量上均呈现减少趋势,因此确定天然植被的适宜生态需水量,对区域水资源的合理配置和科学制定生态恢复方案具有重要的现实意义和借鉴作用。 |
| 关 键 词： | 石羊河流域 天然植被 潜水蒸发 植被适宜生态需水 |
| 收稿时间： | 2013-05-21 |
| 修稿时间： | 2013-05-30 |
Estimation of Ecological Suitable Water Requirements for Natural Vegetation in Shiyang River Basin |
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| CHEN Le,ZHANG Bo and REN Pei-gui. Estimation of Ecological Suitable Water Requirements for Natural Vegetation in Shiyang River Basin[J]. Bulletin of Soil and Water Conservation, 2014, 0(1): 327-333 | |
| Authors: | CHEN Le ZHANG Bo REN Pei-gui |
| Affiliation: | College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China;College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China;College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China |
| Abstract: | The areal data for each type of natural vegetation in 1987, 2000 and 2010 in the Shiyang River Basin were obtained using remote sensing method with the aid of ArcGIS 9.3 software statistics. Accordingly, the ecological water requirements of natural vegetation in different counties and areas of the basin were estimated. By using Avi Lubyanka estimation method, it turned out that the suitable ecological water requirements for natural vegetation was 2.43, 2.34, 2.06 billion m3 in 1987, 2000 and 2010, respectively. The counties, in order of decreasing water requirement, were Sunan County, Tianzhu County, Yongchang County, Minqin County, Gulang County, Liangzhou area and Jinchuan area. The ecological water requirement for each of woodland and grassland in the basin basically took up half the total water demand. However, it is obvious that there was a sharply different percentage for the ecological water requirements of woodland and grassland in different areas, and the water using efficiencies of natural vegetation were between 2.74 and 16.55 kg/(hm2·mm). Through the study of the ecological water requirements of nature vegetation in three different periods, it is found that the water requirement of nature vegetation showed a decreasing trend both in the total water requirement and the coverage degree of natural vegetation. So the determination of the suitable ecological water requirement for natural vegetation has a significant meaning to the rational allocation of water resources and the scientific schemes worked out for ecological restoration. |
| Keywords: | Shiyang River Basin natural vegetation groundwater evaporation suitable ecological water requirement for vegetation |
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