吉林省春季土壤水分分布特征及影响因素分析
作者简介:王 杰(1979-),女,吉林柳河人,硕士,工程师,主要从事GIS和遥感技术应用研究。E-mail:wangjie0122@sina.com
收稿日期: 2011-12-05
要求修回日期: 2012-01-30
网络出版日期: 2012-06-20
基金资助
吉林省科技发展计划项目(20080427)和国家自然科学基金面上项目(41175083)资助
Soil Moisture Characteristics of Spring in Jilin Province and Its Influencing Factors
Received date: 2011-12-05
Request revised date: 2012-01-30
Online published: 2012-06-20
Copyright
利用2003~2010年吉林省春季土壤含水率数据及相关数据,采用常规统计方法、地统计学方法和基于地理信息系统的空间分析方法,讨论吉林省春季土壤水分分布特征,并对其影响因素进行初步分析。结果表明,吉林省春季0~30 cm土壤平均含水率总体上呈由西向东逐渐增加的趋势,空间差异性显著,其中10 cm深度土壤含水率空间差异最大;土壤层之间的距离越近,土壤含水率的相关性越好,东部10 cm深度与其他层次土壤含水率的相关性好于中西部,中部相比东部和西部而言,各层次之间土壤含水率相关性最差。研究还发现,田间持水量和降水量是影响吉林省土壤含水率分布的主要因素,受土壤、气候等自然要素的空间异质性影响,田间持水量对中部和东部的土壤含水率影响更大,而降水对中部和西部的土壤含水率影响更大。
王杰 , 刘珂 , 任红玲 , 唐晓玲 , 李健 , 王颖 . 吉林省春季土壤水分分布特征及影响因素分析[J]. 地理科学, 2012 , 32(6) : 759 -763 . DOI: 10.13249/j.cnki.sgs.2012.06.759
Soil moisture characteristics of spring in Jilin Province and its influencing factors were analyzed with the routine statistics method and geostatistics method integrating spatial analysis technique on GIS, based on the soil moisture data and related data in Jilin Province in 2003-2010. The results were as follows.1)In spring, the soil water content of 0-30 cm was very different between the west and the east of Jilin Province, its spatial distribution showed an increasing trend from west to east. And the spatial distribution of soil water content in 10 cm showed more difference compared with the other 3 layers. With the increase of soil depth, the variation of spatial distribution kept descending, the soil water content increased in the west and the central, but it had no significant change in the east. In all 4 soil layers there were three low soil water content regions and one high region. The low regions were appeared in the west of Jilin Province, Yanbian and the south of Tonghua. And the high region was appeared in Baishan . 2)The soil water content data has better relativity between the closer soil layers. Compared with the west and central regions, the soil water content of 10 cm was correlated with other layers more closely in the east. And the correlation among the layers was the lowest in the central of Jilin Province. Additionally, soil field water-holding capacity and precipitation were the main factors that affect the soil water content in Jilin Province. 3)The soil water content affected more on the soil moisture in the east and the central than the west in Jilin Province. And the effect of precipitation on the soil moisture in the west and the central regions was more significant than that in the east of Jilin Province.
Key words: Jilin Province; soil water content; distribution characteristics
Fig.1 Distribution of soil water content observation stations in Jilin Province图1 吉林省土壤含水率测定站点分布 |
Fig.2 Average soil water content of different regions in Jilin Province图2 吉林省不同区域土壤平均含水率 |
Fig.3 Spatial distribution of average soil water content in 0-30cm in Jilin Province图3 吉林省0~30cm土壤平均含水率空间分布 |
Table 1 Relative coefficients of soil water contents among different layers in three regions of Jilin Province表1 不同区域不同层次土壤间含水率相关系数 |
土壤深度 | 西部 | 中部 | 东部 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
10cm | 15cm | 20cm | 30cm | 10cm | 15cm | 20cm | 30cm | 10cm | 15cm | 20cm | 30cm | |
10cm | 1.00 | 1.00 | 1.00 | |||||||||
15cm | 0.88 | 1.00 | 0.78 | 1.00 | 0.91 | 1.00 | ||||||
20cm | 0.75 | 0.90 | 1.00 | 0.69 | 0.86 | 1.00 | 0.85 | 0.89 | 1.00 | |||
30cm | 0.62 | 0.76 | 0.87 | 1.00 | 0.58 | 0.72 | 0.85 | 1.00 | 0.78 | 0.81 | 0.89 | 1.00 |
Fig. 4 Distribution of 0-30cm field water-holding capacity in Jilin Province图4 吉林省0~30cm土壤田间持水量分布 |
Table 2 Relational coefficients among 5-days precipitation before observation, field water-holding capacity and soil water content表2 观测前5 d降水量、田间持水量与土壤含水率的相关系数 |
土壤深度 | 西部 | 中部 | 东部 | |||
---|---|---|---|---|---|---|
5d降水量 | 田间持水量 | 5d降水量 | 田间持水量 | 5d降水量 | 田间持水量 | |
10cm | 0.27** | 0.65** | 0.24** | 0.78** | 0.05* | 0.69** |
15cm | 0.17** | 0.46** | 0.15** | 0.61** | 0.03 | 0.70** |
20cm | 0.10** | 0.60** | 0.11** | 0.50** | 0 | 0.64** |
30cm | 0.04 | 0.29** | 0.05 | 0.22** | -0.03 | 0.61** |
The authors have declared that no competing interests exist.
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