摘要
以河套灌区内沙壕渠灌域为代表,采用ArcGIS 9.2软件,对土壤采样点不同深度土层的盐化和碱化指标进行等级划分,并进行空间插值,得到了不同深度的盐化分布专题图和碱性分布专题图,实现了盐化、碱化分布的空间可视化。插值结果表明:在空间分布上盐化分布比碱化分布具有更强的变异性,两者在0～10、10～20 cm和20～50 cm土层上具有相同的分布规律,随着土壤深度的增加盐碱化程度呈降低趋势。在此基础上,提出了有针对性地改善灌溉方式、提高耕作技术、结合灌水淋洗使用化学改良剂以及修建排水设施等河套灌区治理盐碱化措施。
It took Shahao sub-main channel irrigation area in Hetao as an example and using ArcGIS 9.2 software, the salinization and alkalization indexes were divided into different grades, and the spatial interpolation was conducted separately. It obtained the spatial distribution maps of salinity and alkalinity in different soil depth, and realized the spatial visualization. The results show that the distribution of salinity has higher variability than alkalinity. In the 0 - 10 cm, 10 -20 cm and 20 -50 cm, it has the same distribution law respectively. With the increasing of soil depth, the saline and alkaline degree is decreasing. Based on this, it proposed several methods to control salt-basification in Hetao irrigation area, such as improving irrigation methods and tillage technology pertinently, using chemical improvement agent in the irrigation water, and constructing drainage facilities.
出处
《人民黄河》
CAS
北大核心
2011年第12期88-91,共4页
Yellow River
基金
国家自然科学基金资助项目(50869006)
关键词
土壤盐碱化
空间插值
河套灌区
soil salinization
spatial interpolation
Hetao irrigation area
