Estimation of Regional Evapotranspiration in Alpine Area and Its Response to Land Use Change: A Case Study in Three-River Headwaters Region of Qinghai-Tibet Plateau, China
文献类型：期刊论文
| 作者 | Li Huixia ; Liu Guohua ; Fu Bojie |
| 刊名 | CHINESE GEOGRAPHICAL SCIENCE
 |
| 出版日期 | 2012 |
| 卷号 | 22期号:4页码:437－449 |
| 关键词 | evapotranspiration (ET) land use change plant-available water coefficient alpine area Three-River Headwaters (TRH) region Qinghai-Tibet Plateau |
| ISSN号 | 1002-0063 |
| 中文摘要 | Three-River Headwaters (TRH) region involved in this paper refers to the source region of the Changjiang (Yangtze) River, the Huanghe (Yellow) River and the Lancang River in China. Taking the TRH region of the Qinghai-Tibet Plateau as a case, the annual evapotranspiration (ET) model developed by Zhang et al. (2001) was applied to evaluate mean annual ET in the alpine area, and the response of annual ET to land use change was analyzed. The plant-available water coefficient (w) of Zhang's model was revised by using vegetation-temperature condition index (VTCI) before annual ET was calculated in alpine area. The future land use scenario, an input of ET model, was spatially simulated by using the conversion of land use and its effects at small regional extent (CLUE-S) to study the response of ET to land use change. Results show that the relative errors between the simulated ET and that calculated by using water balance equation were 3.81% and the index of agreement was 0.69. This indicates that Zhang's ET model based on revised plant-available water coefficient is a scientific and practical tool to estimate the annual ET in the alpine area. The annual ET in 2000 in the study area was 221.2 mm, 11.6 mm more than that in 1980. Average annual ET decreased from southeast to northwest, but the change of annual ET between 1980 and 2000 increased from southeast to northwest. As a vast and sparsely populated area, the population in the TRH region was extremely unbalanced and land use change was concentrated in very small regions. Thus, land use change had little effect on total annual ET in the study area but a great impact on its spatial distribution, and the effect of land use change on ET decreased with increasing precipitation. ET was most sensitive to the interconversion between forest and unused land, and was least sensitive to the interconversion between cropland and low-covered grassland. |
| WOS记录号 | WOS:000308428300006 |
| 公开日期 | 2014-11-05 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7878]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li Huixia,Liu Guohua,Fu Bojie. Estimation of Regional Evapotranspiration in Alpine Area and Its Response to Land Use Change: A Case Study in Three-River Headwaters Region of Qinghai-Tibet Plateau, China[J]. CHINESE GEOGRAPHICAL SCIENCE,2012,22(4):437－449. |
| APA | Li Huixia,Liu Guohua,&Fu Bojie.(2012).Estimation of Regional Evapotranspiration in Alpine Area and Its Response to Land Use Change: A Case Study in Three-River Headwaters Region of Qinghai-Tibet Plateau, China.CHINESE GEOGRAPHICAL SCIENCE,22(4),437－449. |
| MLA | Li Huixia,et al."Estimation of Regional Evapotranspiration in Alpine Area and Its Response to Land Use Change: A Case Study in Three-River Headwaters Region of Qinghai-Tibet Plateau, China".CHINESE GEOGRAPHICAL SCIENCE 22.4(2012):437－449. |
入库方式： OAI收割
来源：生态环境研究中心
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