Method for monitoring topography and erosion amount of head of small-sized gully

Abstract

The invention relates to a method for monitoring a topography and the erosion amount of a head of a small-sized gully. The method comprises the following steps of: I, respectively driving two erosion piles into parts at both sides of a catchment area of the head of the gully, which cannot be eroded by runoff so as to ensure the top ends of the erosion piles to be located on the same horizontal plane; II, horizontally putting a microtopography measurement frame; III, measuring microtopography data of the head of the gully; and IV, measuring the microtopography data of the head of the gully to obtain the elevation distance between a microtopography measurement plane and the microtopography measurement frame; measuring out the topography of the head of the gully; and working out the erosion amount and the variation condition of the topography of the head of the gully in the time quantum by utilizing measured data of two different times. By applying the method disclosed by the invention, the topography of the head of the gully can be very conveniently monitored, and moreover, a measurement result is accurate. The microtopography measurement frame adopted by the method disclosed by the invention is simple in structure and is stronger in popularization and application value. The method for monitoring the topography and the erosion amount of the head of the small-sized gully is suitable for monitoring the topography of the head of the outdoor or indoor simulated small-sized gully and calculating the erosion amount of soil.

Description

technical field [0001] The invention relates to a method for measuring the shape of a ditch head, in particular to a method for monitoring the shape of a small gully head and the amount of erosion. Background technique [0002] There are large gullies distributed in my country's Loess Plateau, Northeast black soil region, and Jinsha River dry-hot valley region. The gully erosion is large and the cutting speed is fast. It not only encroaches on cultivated land, but also destroys roads and accelerates the process of land degradation. The research on gully erosion has great significance The river sediment control and the sustainable development of local economy have far-reaching significance. [0003] The effect of erosion and sediment production is a key part of gully erosion research. At present, the method of sediment monitoring in small watersheds is generally used in research. However, how to quantitatively identify the erosion and sediment production of slopes, ditch walls...

AI Technical Summary

Problems solved by technology

For example, in the article "Application of topographic needle board in the study of slope soil erosion" (China Soil and Water Conservation, 2006 (1): 49-51) published by Ding Wenfeng et al., the topographic needle board combined with related software was used to make slope The three-dimensional images before and after erosion can more intuitively reflect the amount of erosion in different spatial parts of the slope. It cannot be applied to the experimental research on soil erosion of large-scale runoff plots in the field; in the article "Comparative Research on the Monitoring of Gully Erosion Process by Three Measurement Technologies of High-precision GPS, 3D Laser Scanning and Stylus Plate" published by Zhang Peng et al. The 3D laser scanning method is used to monitor the development process of gully erosion on the slope surface. The results show that the laser scanner can monitor the evolution process of gully erosion well, and the estimation accuracy of the erosion amount is high. High requirements and inconvenient carrying in the field limit its wide application

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