基于最大有效持水量的区域土壤墒情监测点布设方法

赵永; 张宝忠; 胡振华; 金建华

引用本文:	赵永,张宝忠,胡振华,等.基于最大有效持水量的区域土壤墒情监测点布设方法[J].灌溉排水学报,0,():-.
	ZHAO Yong,ZHANG Baozhong,HU Zhenhua,et al.基于最大有效持水量的区域土壤墒情监测点布设方法[J].灌溉排水学报,0,():-.

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基于最大有效持水量的区域土壤墒情监测点布设方法
赵永¹, 张宝忠², 胡振华¹, 金建华^2,3
1.山西农业大学林学院;2.中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;3.天津农学院水利工程学院

摘要:

区域土壤墒情的准确获取能够有效提升农业用水管理水平,支撑现代农业发展。本文基于经典统计学和地统计学方法,以土壤最大有效持水量为关键参数,构建土壤墒情监测点的优化布设方法,并以北京市大兴区冬小麦田为例进行验证。研究结果表明：试验区土壤最大有效持水量在土层深度为0~20 cm、20~40 cm、40~60 cm、60~80 cm以及0~40 cm、0~80 cm的均值都表现为中等程度变异； 0~40 cm和0~80 cm土层深度的空间区域合理监测数分别为6个和4个,且确定了监测点的位置坐标；优化布设点监测值与全区域61个监测点实测平均土壤墒情相比,误差均在10%以内。因此,基于最大有效持水量的区域土壤墒情监测点布设方法能够在保证区域土壤墒情监测精度的情况下,大幅减少监测点布设数量。

关键词: 土壤最大有效持水量;优化布设;空间变异;地统计学;土壤墒情

DOI：

分类号:S152.7

基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目），水利部公益性行业科研专项（201501016）

Monitoring and setting method of regional soil moisture based on maximum effective water holding capacity

ZHAO Yong¹, ZHANG Baozhong², HU Zhenhua¹, JIN Jianhua^2,3

1.Forestry College,Shanxi Agriculture University;2.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research;3.College of Water Conservancy Engineering,Tianjin Agricultural University

Abstract:

The accurate acquisition of regional soil moisture can effectively improve the level of agricultural water management and support the development of modern agriculture. Based on the classical method and geostatistics , this paper used the maximum effective water holding capacity of soil as the key parameter to construct the optimal layout method of soil moisture monitoring points, and took the winter wheat field in Daxing District of Beijing as an example to verify method. The results showed that the maximum effective water holding capacity of soil in the experimental area has moderate variation at the soil depth of 0~20 cm,20~40 cm,40~60 cm , 60~80 cm and 0~40 cm ,0~80 cm; The reasonable monitoring points number of 0~40 cm and 0~80 cm soil depth is 6 and 4, respectively, and the location coordinates are determined; Compared with the average soil moisture content of 61 monitoring points in the whole region, the error of the monitoring value of the optimized monitoring point is within 10%. Therefore, the method of arranging soil moisture monitoring point based on the maximum effective water holding capacity can greatly reduce the number of monitoring points when the condition of ensuring the monitoring accuracy of regional soil moisture.

Key words: Maximum effective water holding capacity of soil; Optimal layout; Spatial variability; geostatistics; Soil moisture