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LY/T 1688-2007: Indicators system for long-term observation of forest ecosystem in arid and semi-arid zone
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Indicators system for long-term observation of forest ecosystem in arid and semi-arid zone
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LY/T 1688-2007
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Basic data | Standard ID | LY/T 1688-2007 (LY/T1688-2007) | | Description (Translated English) | Indicators system for long-term observation of forest ecosystem in arid and semi-arid zone | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B65 | | Classification of International Standard | 65.020 | | Word Count Estimation | 12,159 | | Date of Issue | 2007-06-04 | | Date of Implementation | 2007-10-01 | | Quoted Standard | LY/T 1606-2003 | | Regulation (derived from) | Chinese industry standard filing Notice 2007 No. 9 (No. 93 overall) | | Issuing agency(ies) | State Forestry Administration | | Summary | This standard specifies the arid and semi- arid forest ecosystem observations, namely meteorological conventional indicators, forest microclimate and gradient index, the forest atmospheric deposition targets, the physical and chemical indicators of forest soils, forest ecosystem health indicators, indicators of forest hydrology and forest communities characteristics of targets. This standard applies to the range of arid and semiarid zones of forest ecosystem observation. | LY/T 1688-2007: Indicators system for long-term observation of forest ecosystem in arid and semi-arid zone
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Indicators system for long-term observation of forest ecosystem in arid and semi-arid zone
ICS 65.020
B65
People's Republic of China Forestry Industry Standard
Arid and semi-arid forest ecosystem
Positioning observation index system
Released on.2007-06-04
2007-10-01 implementation
State Forestry Administration released
Foreword
This standard is proposed and managed by the State Forestry Administration.
This standard is drafted by. Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing Forestry University.
The main drafters of this standard. Wang Bing, Yu Xinxiao, Rao Liangzhu, Li Shaoning, Zheng Qiuhong, Cui Xianghui.
This standard was first published.
Arid and semi-arid forest ecosystem
Positioning observation index system
1 Scope
This standard specifies the indicators for the observation of forest ecosystems in arid and semi-arid areas, namely meteorological indicators, forest microclimates and gradients.
Standards, forest atmospheric deposition indicators, physical and chemical indicators of forest soils, forest ecosystem health indicators, forest hydrological indicators and forest community characteristics
Signs.
This standard is applicable to the observation of forest ecosystems in arid and semi-arid regions of China.
2 Normative references
The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all
Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study
Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.
LY/T 1606-2003 Forest Ecosystem Positioning Observation Index System
3 Terms and definitions
The terms and definitions established by LY/T 1606-2003 and the following terms apply to this standard.
3.1
The boundary line from Hailar---Ulanhot---Tongliao---Nurur Hushan---Northern Taihang Mountains---Central Shanxi---North of the Weihe River
Mountain---the upper reaches of the Weihe River---the vicinity of Aba in Sichuan---Changdu in Tibet---the junction of the southwest of China and the Kingdom of Bhutan
The northwestern part of the line is the arid and semi-arid area of China. It is located between 27° and 50° north latitude and between 74° and 122° east longitude.
3.2
Also known as the dryness index or the drying factor, it is an index describing the degree of dryness of the climate, and the coefficient of wetting is reciprocal to each other.
The ratio of consumption to income represents the ratio of annual evaporation to annual precipitation.
3.3
The amount of water lost when the soil is dried at 105 ° C to constant weight, the mass of water in the unit soil mass (mass fraction) or unit soil capacity
The volume (volume fraction) of water in the product is expressed.
3.4
Direct radiation from the sun's surface and a very narrow circular sky radiation around the sun (annual radiation). It is indicated by the symbol S.
3.5
The portion of short-wave radiation that is reflected upward by the underlying surface (active layer) after the total radiation reaches the ground. It is represented by the symbol Er↑.
3.6
Optical radiation having a wavelength in the range of about 10 nm to 400 nm.
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