黄土高原降水资源特征及造林适宜性研究。

Q3 Environmental Science
He Yongtao, Li Wenhua, Lang HaiOu
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引用次数: 6

摘要

黄土高原地处干旱半干旱区,是一个降水少、蒸发剧烈的脆弱地区。因此,水分是最重要的限制因素,如何根据降水恢复不同区域的适宜植被是高原生态保护和更新的基础。利用黄土高原68个气象站1961—2000年40年的气候观测资料,分析了黄土高原的降水特征。结果表明:青藏高原不同地区的降水量差异明显,年平均降水量从南部的600 mm减少到北部的200 mm;年降水量80%发生在植物生长期,春季和秋季干旱,夏季多雨。根据森林生态系统生长期的水分平衡,利用降水量和林地生态需水量计算造林适宜性。其中以黄土高原县域为单位,划分了4个不同的造林区域。结果表明:高原树木适宜种植面积约占整个高原面积的1 / 4,灌木适宜种植面积约占整个高原面积的1 / 4。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the characteristics of precipitation resources and the afforestation suitability in the Loess Plateau.
Located in the arid and semi-arid regions,the Loess Plateau is a fragile region with low precipitation and intensive evaporation.Therefore,water is the most important limiting factor,and how to restore suitable vegetation in different regions based on the precipitation is a foundation to the ecological conservation and regeneration in the plateau.Based on the 40-year(1961-2000) climate data observed by 68 meteorological stations in the Loess Plateau,the precipitation characteristics in the plateau are analyzed.The results show that precipitation is distinctly different from the different areas,the average annual precipitation decreases from 600 mm in the south to 200 mm in the north of the plateau;80% annual precipitation occurs in plant growing season,so it is drought in spring and autumn but rainy in summer.According to the water balance of the forest ecosystem in growing season,the afforestation suitability is calculated using precipitation and ecological water requirement of woodlands.On which four different regions for afforestation are divided by regarding the counties in the Loess Plateau as the units.The results reveal that the area suitable to plant trees is about one quarter of the whole plateau,and another one quarter of the plateau are suitable to plant shrubs.
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来源期刊
干旱区研究
干旱区研究 Environmental Science-Water Science and Technology
CiteScore
2.50
自引率
0.00%
发文量
4294
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