A non-weighing lysimeter that can measure seepage water volume and slope surface water volume separately

Abstract

The invention belongs to the field of hydraulic engineering, and particularly relates to a non-weighing lysimeter capable of measuring the water seepage quantity and the slope surface water quantity.The lysimeter specifically comprises a lysimeter barrel; the lysimeter barrel is divided into three parts of an exposed section, a soil column section and a filtering section from top to bottom in sequence; the exposed section completely stretches out of the ground; the height of the soil column section is 60%-75% of the total height of the lysimeter barrel, and is 10 cm or above greater than thedistribution depth of 95% or above of local plant root systems in the soil; the soil column section is filled with local soil; an inner ring is arranged in the filtering section; the interior of the inner ring and the space between the filtering section and the inner ring are both fully filled with fillers; and the bottom of the lysimeter barrel is provided with an inner ring drainage opening andan outer ring drainage opening which are connected with an inner water storage tank and an outer water storage tank correspondingly. According to the non-weighing lysimeter, the runoff amount, the seepage quantity and the seepage time can be simply and accurately measured, and operation is easy and convenient; a quantitative calculation method is provided for assessing the water supply capacity ofan ecosystem; and a new idea is provided for assessing the influence of the change of environmental factors on water source supply of a grassland ecosystem.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and in particular relates to a non-weighing lysimeter which can measure the infiltration water volume and slope surface water volume respectively. Background technique [0002] Existing studies have shown that the water supply capacity of an ecosystem is affected not only by ecological factors such as plant community structure, species composition, plant functional characteristics, and surface soil properties, but also by physical factors such as climate, topography, and soil type. influences. In recent years, human activities and climate change have, on the one hand, changed the water supply capacity of the ecosystem through direct effects on characteristics such as evaporation, transpiration, and infiltration; Changes in the ecosystem indirectly change the water supply capacity of the ecosystem. Therefore, under the background of intensified climate change and human activities, ac...

AI Technical Summary

Problems solved by technology

However, the former has the problems of low precision and low resolution; the latter has problems such as high cost, large space occupation, and difficulty in promotion.

Images