横断山区土壤相对湿度时空分异
作者简介:朱国锋(1983-),男,甘肃平凉人,博士,主要从事寒区水文与水资源研究。E-mail:guofeng_zhu@yahoo.cn
收稿日期: 2011-09-11
要求修回日期: 2011-11-08
网络出版日期: 2012-07-20
基金资助
国家自然科学基金(40971019)、国家重点基础研究发展(973)计划(2007CB411501)、国家自然科学基础人才培养基金冰川学冻土学特殊学科点 (J0630966)、中国科学院研究生科技创新与社会实践资助专项、冰冻圈科学国家重点实验室自主项目、中国科学院重要方向性项目(KZCXZ-YW-317)、中国科学院“西部之光”人才培养计划“西部博士资助项目”(O828A11001)、国家自然科学基金项目(90511007、40801028)资助
Spatial and Temporal Variation of Soil Relative Moisture in Hengduan Mountainous Region, China
Received date: 2011-09-11
Request revised date: 2011-11-08
Online published: 2012-07-20
Copyright
以1992~2010年横断山区16个观测站土壤相对湿度资料为基础,通过Kriging插值法分析土壤相对湿度季节分异和空间分异特征。结果表明:横断山区年土壤相对湿度自1992年以来整体呈波动增加趋势,年际变化倾向率为0.51% /a;横断山区土壤相对湿度表现为西南和东北部较高,东南和西北部较低,中部土壤相对湿度增加趋势强于边缘,深层土壤的相对湿度整体大于浅层土壤。春、夏季土壤相对湿度增加趋势比秋、冬季明显。
关键词: 土壤相对湿度; 横断山区; Kriging插值法; 时空分异
朱国锋 , 蒲焘 , 何元庆 , 张涛 , 杜建括 , 辛惠娟 , 牛贺文 . 横断山区土壤相对湿度时空分异[J]. 地理科学, 2012 , 32(7) : 872 -877 . DOI: 10.13249/j.cnki.sgs.2012.07.872
Based on soil relative moisture data in ten days from 16 observation stations of Hengduan Mountainous Region in 1992-2010, spatial and temporal changes of soil relative moisture were analyzed in the paper with Kriging interpolation method. The results showed that the soil relative moisture in Hengduan Mountainous Region had been in a increasing tendency since 1992 with the inclination rate of 0.51%/a. The soil relative moisture were high relatively in the southwest and the northeast of Hengduan Mountains whereas low in the southeast and the northwest. The values of soil relative moisture in deep soils were higher than that in shallow soil. As far as the seasonal change, the increasing trend of soil relative moisture in spring and summer were greater than that in autumn and winter.
Table 1 Soil moisture stations of agrometeorological station in Hengduan Mountains表1 横断山区农业气象观测站土壤水分观测站点 |
站点 | 经度(°)E | 纬度(°)N | 气温(℃) | 降水(mm) |
---|---|---|---|---|
石渠 | 98.1 | 33.0 | 0.55 | 764 |
察隅 | 97.5 | 28.7 | 13.6 | 1052 |
稻城 | 100.3 | 29.1 | 5.5 | 711 |
灌县 | 103.7 | 31.0 | 15.9 | 746 |
温江 | 103.8 | 30.7 | 16.7 | 727 |
邛崃 | 103.5 | 30.4 | 16.7 | 761 |
洪雅 | 103.4 | 29.9 | 17.5 | 1354 |
汉源 | 102.7 | 29.4 | 18.0 | 639 |
昭觉 | 102.9 | 28.0 | 11.3 | 744 |
西昌 | 102.3 | 27.9 | 16.9 | 909 |
六库 | 98.9 | 26.9 | 21.0 | 614 |
丽江 | 100.5 | 26.8 | 13.8 | 820 |
米易 | 102.1 | 26.9 | 19.2 | 1157 |
宁南 | 102.8 | 27.1 | 19.7 | 976 |
保山 | 99.2 | 25.1 | 17.0 | 660 |
楚雄 | 101.5 | 25.0 | 17.1 | 619 |
Fig. 1 Spatial distribution of soil moisture stations in Hengduan Mountains图1 横断山区土壤水分观测站空间分布 |
Table 2 Spatial distribution of relative soil moisture in Hengduan Mountains in 1992-2009(%)表2 1992~2009年横断山区土壤相对湿度空间分布(%) |
春季平均 | 夏季平均 | 秋季平均 | 冬季平均 | 雨季平均 | 干季平均 | 多年平均 | |
---|---|---|---|---|---|---|---|
干土层 | >3 mm | <3 mm | <3 mm | >3 mm | <3 mm | >3 mm | >3 mm |
10 cm | 69 | 87.9 | 89.0 | 66.6 | 87.4 | 67.4 | 77.4 |
20 cm | 70.8 | 88.7 | 92.6 | 73.1 | 89.2 | 73.4 | 81.3 |
50 cm | 78.7 | 86.2 | 89.5 | 82.4 | 86.5 | 81.9 | 84.2 |
Fig.2 Annual relative soil moisture interpolation in Hengduan Mountains in 1992-2009图2 横断山区年均土壤相对湿度插值 |
Fig.3 Interannual variation of relative soil moisture in layer 10 cm,20 cm and 50 cm in Hengduan Mountains in 1992-2010图3 1992~2010年横断山区10、20和50 cm土壤相对湿度年际变化 |
Fig.4 The tendency interpolation of mean relative soil moisture in Hengduan Mountains in 1992-2010图4 1992~2010年横断山区土壤平均相对湿度年际变化倾向率插值 |
Fig.5 Monthly variation of relative soil moisture in the Hengduan Mountains图5 横断山区土壤相对湿度年内变化 |
The authors have declared that no competing interests exist.
[1] |
|
[2] |
|
[3] |
|
[4] |
|
[5] |
|
[6] |
|
[7] |
|
[8] |
|
[9] |
|
[10] |
|
[11] |
|
[12] |
|
[13] |
|
[14] |
|
[15] |
|
[16] |
|
[17] |
|
[18] |
|
[19] |
|
[20] |
|
[21] |
|
/
〈 |
|
〉 |