资源科学 ›› 2017, Vol. 39 ›› Issue (2): 263-275.doi: 10.18402/resci.2017.02.09
刘磊1(), 李小雁1,2(
), 蒋志云1, 魏俊奇1, 南木甲3
收稿日期:
2016-04-27
修回日期:
2016-09-18
出版日期:
2017-02-25
发布日期:
2017-02-20
作者简介:
作者简介:刘磊,男,河南信阳人,硕士生,主要从事生态水文研究。E-mail:
基金资助:
Lei LIU1(), Xiaoyan LI1,2(
), Zhiyun JIANG1, Junqi WEI1, Mujia NAN3
Received:
2016-04-27
Revised:
2016-09-18
Online:
2017-02-25
Published:
2017-02-20
摘要:
在气候变化背景下探讨流域不同海拔高度的土壤水分状况,对于深入认识变化环境下流域水资源特征具有十分重要的意义。本文通过对青海湖流域不同海拔高度的土壤水分采样,探讨了流域土壤水分的时空变化规律,并对生长季流域不同海拔的水分盈亏状况进行了初步分析,结果表明:①流域平均土壤含水量在生长季旺期达到峰值(28.79%),生长季初期(22.81%)和生长季末期(22.91%)相对较低;随海拔的升高,流域土壤含水量不断增加,且在生长季旺期增加最为显著(P<0.01);②经过一个生长季,湖滨3200~3300m海拔范围内土壤水分收支略有亏缺,减少1.24%,3300~3400m和3400~3600m海拔范围内,水分收支基本平衡,分别增加0.54%和-0.57%,3600~3800m海拔范围内,水分收支有所盈余,增加3.69%;流域海拔3800m以上地区为水分盈余区,且该区域对气候变化较为敏感,气温升高一旦导致流域水分收支平衡区向高海拔推进,将会使青海湖流域水分盈余区大面积减小,进而对流域水资源造成严重影响。
刘磊, 李小雁, 蒋志云, 魏俊奇, 南木甲. 青海湖流域不同海拔高度土壤水分时空变化特征[J]. 资源科学, 2017, 39(2): 263-275.
Lei LIU, Xiaoyan LI, Zhiyun JIANG, Junqi WEI, Mujia NAN. Variation in soil water content along different altitude gradients in the Qinghai Lake Watershed[J]. Resources Science, 2017, 39(2): 263-275.
表2
2015年青海湖流域生长季各海拔梯度的土壤含水量与相对土壤含水量"
海拔梯度/m | 绝对含水量/% | 相对含水量/% | |||||
---|---|---|---|---|---|---|---|
生长季初期 | 生长季旺期 | 生长季末期 | 生长季初期 | 生长季旺期 | 生长季末期 | ||
3200~3300 | 19.10±1.60 | 21.05±1.76 | 17.93±1.34 | 57.91±5.06 | 63.76±5.51 | 54.35±4.27 | |
3300~3400 | 18.33±1.98 | 24.96±2.17 | 19.81±1.71 | 53.40±6.83 | 73.16±8.24 | 57.26±5.18 | |
3400~3600 | 24.04±2.36 | 33.55±1.81 | 23.51±2.89 | 65.71±6.75 | 91.41±5.27 | 64.01±7.75 | |
3600~3800 | 31.69±3.05 | 40.56±3.30 | 33.20±2.18 | 79.24±7.70 | 93.90±4.14 | 83.09±5.59 |
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