黄土高原SRC参数的空间物理释义与流量估算应用
Spatial Physics Interpretation and Estimation Application of the Parameters of SRC in the Loess Plateau
薛超伟 1张洪波 2冶兆霞 1张雨柔 1杨志芳 1赵孝威 1李同方1
作者信息
- 1. 长安大学 水利与环境学院,陕西 西安 710054;长安大学 旱区地下水文与生态效应教育部重点实验室,陕西 西安 710054
- 2. 长安大学 水利与环境学院,陕西 西安 710054;长安大学 水利部旱区生态水文与水安全重点实验室,陕西 西安 710054
- 折叠
摘要
黄土高原地处我国西北旱区,降水稀少且潜在蒸发强烈,包气带较厚且空间异质性大等多种问题交织耦合导致区域河川径流演化机制极其复杂,影响区域生态保护与高质量发展的进程.对黄土高原不同生态分区的 10 个代表性流域的SRC参数进行空间分析,研究了SRC参数的异质性分布规律,探析了SRC参数在黄土高原地区的物理释义,并基于SRC建立了流域出口断面流量与陆地水储量的区域化响应关系,实现了通过GRACE重力卫星反演数据对流域出口断面流量的初步估算.研究表明,同一生态区内SRC参数α、β具有一定的稳定性,其中β和流域的干旱指数成负相关关系,与平均坡度成正相关关系,在地理位置中随纬度的减小和经度的增大而增大;而α则和土壤孔隙度存在正相关关系,与导水率衰减参数存在负相关关系.通过幂函数可建立黄土高原流域陆地水储量与出口断面流量间的拟合关系,并形成适用于平稳GRACE数据的流域流量过程估算方法.
Abstract
Located in northwest China's arid region,the Loess Plateau features great spatial diversity,high evaporation,little rainfall,and a deep unsaturated zone.The complex evolutionary mechanism of regional river runoff is influenced by the interplay of several elements.These factors have a big impact on achieving high-quality development and protecting the environment in the region.The Streamflow Recession Curve(SRC)'s characteristic parameters were analyzed spatially in ten typical watersheds from a variety of Loess Plateau biological zones.The objective was to look into the SRC parameter distribution patterns and offer a physical interpretation of these parameters in the area.Fur-thermore,using information from the GRACE gravity satellite,the study produced a preliminary estimate of the flow at the basin outflow and built a regional response relationship between the flow at the basin outlet and land water storage based on the SRC.The studies reveal a high degree of stability for the SRC parameters α and β in the same ecological zone.At a particular geographical location,there is an increase in β when latitude lowers and longitude increases.It also has a negative correlation with the watershed's drought index and a positive correlation with the average slope.The variable α shows an inverse relationship with the hydraulic conductivity attenuation parameter and a direct associ-ation with soil porosity.Finally,a power function can be used to estimate the relationship between the amount of water held on land and the a-mount of runoff from rivers in the Loess Plateau watershed.Additionally,it offers a method for reversing the basin flow process that is created especially for the analysis of steady GRACE data.
关键词
SRC/特征参数/空间分布/影响因素/GRACE/黄土高原Key words
streamflow recession curve/characteristic parameters/spatial distribution/influencing factors/GRACE/Loess Plateau引用本文复制引用
基金项目
国家自然科学基金(52379003)
国家自然科学基金(51979005)
陕西省自然科学基础研究计划(2022JC-LHJJ-03)
中央高校基本科研业务费专项(30012293201)
出版年
2024
国家科技期刊平台
NSTL
万方数据