Slope runoff and water chemical index comprehensive determination method

Abstract

The invention discloses a slope runoff and water chemical index comprehensive determination method. The method comprises the following steps: I, establishing a slope runoff and water chemical index comprehensive determination apparatus comprising a water pipe, a circular ring, a cylindrical or hemispherical shell, a skip-bucket rain gauge, a disc, a metal net, a cubic shell, a funnel, a 90-degree elbow, a horizontal PVC pipe, a tee joint, an inverted U-shaped pipe, a movable choke plug, a variable-diameter pipe head, a water collection bottle, a disc base and inner threads; II, introducing slope runoff into the skip-bucket rain gauge by virtue of the water pipe, after the rain gauge is fully filled with the water, enabling the rain gauge to roll automatically, enabling waste water to flow through the metal net, the funnel, the 90-degree elbow, the PVC pipe, the tee joint and the inverted U-shaped pipe to enter the water collection bottle so as to be used for the subsequent water quality determination and analysis, opening the movable choke plug at the tee joint, directly inserting an electric conductivity meter, and measuring the water temperature and the electric conductivity in real time. According to the method, the collection of the slope runoff and the water sample determination are integrated, the measurement system is comprehensive, and the collection and measurement accuracy can be improved.

Description

technical field [0001] The invention relates to the fields of ecological hydraulics and forestry, in particular to a method for comprehensively measuring slope runoff and water chemical indexes. Background technique [0002] Slopes include agricultural slopes, forest slopes and barren slopes. Slope erosion can cause loss and destruction of sustainable land productivity, and eroded sediment enters rivers or reservoirs, causing even greater siltation hazards and losses. Because of this, scholars at home and abroad have done a lot of research on slope erosion. Slope erosion involves the influence of many environmental factors. Among them, slope runoff plays an important role in soil erosion. If there is no surface runoff, even if there are other environmental factors, there will be no meaningful slope erosion. At the same time, because rainfall causes runoff on slope land, the nitrogen, phosphorus and other substances carried by runoff are one of the important ways to cause n...

AI Technical Summary

Problems solved by technology

The sump method has obvious disadvantages: 1) When the runoff is large, it is easy to overflow, and in the case of a high groundwater level, groundwater leakage is prone to occur, and it is difficult for the sump to discharge these seepage errors; 2 ) The water collection pool is a fixed facility and cannot be moved, so it is difficult to achieve multi-point detection; 3) The measured parameters are single, and can only measure the total amount of runoff, but cannot measure various agrochemical indicators such as nitrogen and phosphorus in slope runoff; 4) It is impossible to reduce the impact of evaporation on the measurement results. After the slope runoff occurs, it is often difficult to measure the water volume of the sump in time, which affects the measurement accuracy of the runoff

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