A device and method for measuring grass crown interception
A technology of interception and grass crown, which is applied in the field of measuring devices for grass crown interception, can solve problems such as time-consuming and labor-intensive, and achieve the effects of convenient operation, simple device structure and low technical requirements.
Inactive Publication Date: 2015-11-11
BEIJING FORESTRY UNIVERSITY
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Moreover, the wiping process is time-consuming and labor-intensive, causing a lot of inconvenience
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[0033] Such as Figure 1-Figure 3 As shown, a device for measuring grass crown interception includes a double-ring device 5 and a runoff receiving device 8 below it.
[0034] The double-ring device 5 is two concentric cylinders without a cover, including the outermost outer ring 1 and the inner ring 2 located inside the outer ring; the height of the inner ring 2 is lower than that of the outer ring 1, and the bottom surface of the inner ring 2 is a grid The sieve 4 has permeable holes 3 on the side, the aperture is 0.1cm, and the distribution density is the same as the grid sieve. The height of the outer ring is 27cm, the inner diameter is 35cm, and the area is 961.625cm 2 , denoted as S 2 . The height of the inner ring is 22cm, the inner diameter is 20cm, and the area is 314cm 2 , denoted as S 1 . The inner and outer rings are made of hard transparent plastic.
[0035] The runoff receiving device 8 includes a receiving funnel 6 and a receiving bucket 7 below it. The b...
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Abstract
The invention discloses a device and method for measuring interception of a grass canopy, which relate to the technical field of forestry meteorology observation instrument. The device comprises a double-ring device (5) and a running water receiving device (8) which is arranged below the double-ring device (5); the double-ring device (5) is two concentric cover-free cylinders and comprises an outer ring (1) on the outermost side and an inner ring (2) on the inner side of the outer ring; the height of the inner ring (2) is lower than that of the outer ring (1), the bottom surface of the inner ring is a grid mesh (4), and the side surface of the inner ring is provided with water permeable holes (3); the running water receiving device (8) comprises a receiving funnel (6) and a receiving barrel (7) which is arranged below the receiving funnel. The method comprises the steps of paving a piece of filter paper, filling soil, seeding, setting parameters of an artificial rainfall device, charging water into the outer ring, recording the water depth inside the receiving barrel, calculating and the like. The device is simple in structure and convenient to operate. The method is simple, time-saving, labor-saving and unlikely to influence by an observation method and wind, and the error in the entire operation process is small.
Description
technical field [0001] The invention relates to the technical field of forestry meteorological observation instruments, in particular to a device and a method for measuring grass crown interception of different types of grass under different rainfall conditions and different cover degrees. Background technique [0002] In the process from rainfall to runoff, according to the principle of water balance, the runoff can be calculated only when the amount of interception by the grass canopy is accurately known. Whether the interception of the corresponding herbaceous plants can be accurately measured under a certain coverage will directly affect the evaluation of the interception capacity of the grass canopy and the accurate prediction of grassland runoff. [0003] At present, scientific researches such as grass industry and forestry mainly use the wiping method to measure grass canopy interception. This method uses the principle of poor quality to sample in rainfall plots, and ...
Claims
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IPC IPC(8): G01N33/00
Inventor 毕华兴朱永杰霍云梅许华森高路博王晓贤王晓燕常译芳次仁曲西廖文超
Owner BEIJING FORESTRY UNIVERSITY