摘要
以山西吉县蔡家川小流域土壤水分有效性分级为基础,通过对291个土壤水分监测点在旱季的土壤水分监测(TDR土壤水分测定法),以变异函数为主要工具,以普通克里格法和指示克立格法为基本方法,研究土壤水分空间分布及土壤水分有效性水平在空间上的概率分布。研究结果表明:试验区土壤有效水和无效水的分界为13.46%(0~30cm)、12.48%(30~60cm),速效水和迟效水的分界为15.20%(0~30cm)、14.20%(30~60cm);通过克立格插值估计整个研究区坡面0~30cm、30~60cm土壤水分平均值为10.94%、11.88%,处于土壤无效水含量范围内的面积占总面积的75.7%、55.7%;土壤水分有效性的概率分布与坡向关系密切,土壤有效水的概率自东北向西南递减。30~60cm土层出现有效水区域及相对应的概率远大于0~30cm土层。
Based on the validity classification of soil moisture in the Caijiachuan watershed, using the variogram as a main tool and the ordinary Kriging and indicator Kriging theory, the spatial distribution of soil moisture and validation was conducted through 291 sites soil moisture detection ( different depth of soil profile, 0 ~30 cm and 30 ~ 60 cm) by TRIME-TDR in research area. The used Kriging could acquire a fine estimation of soil moisture. The result shows that (1) the validation (valid and invalid) of soil moisture was divided by 13.46% (0 ~ 30 cm) and 12.48% (30 ~ 60 cm), respectively; (2) The average of the soil moisture in the area is 10.94% (0 ~30 cm) and 11.88% (30~ 60 cm), respectively; (3) The area where the soil moisture is in the range of invalid takes about 75.7% (0~ 30 cm) and 55.7% (30~60 cm) of the whole reserch area, respectively; (4) The validity of soil moisture is in dose relation with the slop directions; (5)The probability of soil moisture descends from northeast to southwest in research area; and (6)through the compare the ranger and probability of valid soil moisture in different depth (0 ~30 cm and 30 ~ 60 cm) of soil profile , the result shows that the latter is much more than that in former.
出处
《土壤学报》
CAS
CSCD
北大核心
2006年第6期1004-1010,共7页
Acta Pedologica Sinica
基金
973项目(2002CB111503)
国家"十五"攻关资助项目(2001BA510B0101)共同资助