Portable litter water-holding capacity measuring bag and measuring method

Abstract

The invention discloses a litter water-holding capacity portable measuring bag and a measuring method, the measuring bag comprises a bag made of non-woven fabrics, the bag is only provided with an opening, and the bag is in a rectangular state in a storage state and is in a cylindrical state in an unfolding state; a sealing edge is arranged at the bag opening; a hanger is arranged on the outer side of the bag close to the opening; during sampling, the cutting ring is directly embedded into the measuring bag which is in a cylindrical state after being unfolded, after the cutting ring is taken out, the original state level of a litter layer is kept, the measuring bag is soaked in water, and after water holding is saturated, the measuring bag is taken out to control water, measure the weightand calculate the water holding capacity; by keeping the original state layer of the litter layer, the water holding characteristic of the litter layer can be reflected more truly, and then the measurement accuracy is improved; the adopted measuring bag is of a rectangular structure in the storage state, the occupied space is small, storage and carrying are convenient, the design of the hanging lugs enables the measuring bag to be matched with various measuring containers, and use is convenient.

Description

technical field [0001] The invention relates to the technical field of forestry, in particular to a portable measuring bag for litter water holding capacity. Background technique [0002] In forestry surveys, the water-holding characteristics of litter are the basic content of forest hydrological surveys. The traditional measurement uses the soaking method, using self-made nylon mesh bags, and mixing litter of different levels after collection into it. , after the water holding capacity is saturated, take out the control water, measure the weight, and calculate the water holding capacity. However, this method has many disadvantages in practice: [0003] 1. If the mesh of the nylon mesh bag is small, the water cannot fully enter the bag, which will affect the litter to reach the saturated water holding capacity; if the mesh is large, the decomposed litter powder will leak out, resulting in measurement errors; [0004] 2. In the early stage, the water absorption speed of the...

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Problems solved by technology

[0003] 1. If the mesh of the nylon mesh bag is small, the water cannot fully enter the bag, which will affect the litter to reach the saturated water holding capacity; if the mesh is large, the decomposed litter powder will leak out, resulting in measurement errors;

[0004] 2. In the early stage, the water absorption speed of the litter is fast, and the weight measured in a short time is greatly disturbed by the absorption of the nylon mesh bag, resulting in measurement errors;

[0005] 3. The litter can only be mixed and sampled, and the original layer of the litter layer cannot be maintained, and the water-holding characteristics of the litter layer cannot be truly reflected;

[0006] 4. The traditional litter water holding capacity measurement needs enough water, and real-time sampling and measurement in the field cannot be realized

[0007] Based on this, the Chinese patent "CN209248054U" discloses a device for measuring the water holding capacity of understory litter. Through its optimization and improvement of the retaining net, the retaining net has the technical effect of adjusting the mesh size; however, with What it brings is the complexity of the structural design, which in turn exacerbates the problem of inconvenient carrying, and it cannot be measured in real time in the field. At the same time, it still cannot maintain the original level of the litter layer, and cannot truly reflect the water holding capacity of the litter layer. characteristic

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