Eutrophic lake total algae storage remote sensing evaluation method

A technology for eutrophication and lakes, applied in computing, image data processing, instruments, etc., can solve difficult problems such as the distribution of algae, and achieve the effect of effectively evaluating performance

Active Publication Date: 2016-06-01
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology

Therefore, it is difficult to truly characterize the distribution of algae in the water body by monitoring the area covered by algae

Method used

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  • Eutrophic lake total algae storage remote sensing evaluation method
  • Eutrophic lake total algae storage remote sensing evaluation method
  • Eutrophic lake total algae storage remote sensing evaluation method

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Embodiment Construction

[0031] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0032] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those concepts and embodiments described in more detail below, can be implemented in any of a number of ways, which should be the concepts and embodiments disclosed by the present invention and not Not limited to any implementation. In addition, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.

[0033] The present invention gives MODIS satellite data to remote...

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Abstract

The invention provides an eutrophic lake total algae storage (token state: total chlorophyll a, dimension: t) remote sensing evaluation method comprising the steps that the quantitative relation between NDBI and concentration of water surface chlorophyll a is acquired based on bio-optical model simulation and actually measured data and popularized to MODIS satellite image data through Rayleigh scattering correction; the water depth spatial distribution situation of the Chaohu Lake is determined based on the water level of the Chaohu Zhongmiao Temple and the Chaohu brake of the same day and Chaohu underwater DEM; the lake NDBI threshold is judged through screening based on actually measured profile empirical data, and the evaluation method for total storage of algae in a unit water column under the algae bloom and non-algae bloom conditions is constructed; and the evaluation method for total storage of algae in a unit image element based on MODIS satellite images is constructed. The annular and monthly change rule of eutrophic lake total algae storage and spatial distribution thereof can be accurately acquired based on the method.

Description

technical field [0001] The invention relates to a remote sensing estimation method for the total stock of algae in a eutrophic lake. Background technique [0002] The algal blooms caused by algae blooms are an important feature of lake water eutrophication (Kong Fanxiang and Gao Guang, 2005), and my country has become one of the countries with the most serious outbreaks of cyanobacteria blooms and the widest distribution in the world (Wu Qinglong et al., 2008) . Satellite remote sensing has the characteristics of fast, large-scale, and periodicity, and has become an indispensable technical means for monitoring, forecasting and early warning of cyanobacteria blooms in lakes (Pandel and Ma Ronghua, 2008). At present, the satellite remote sensing monitoring of cyanobacterial blooms in the middle and lower reaches of the Yangtze River in my country (Taihu Lake, Chaohu Lake, etc.) has basically realized operational operation (Ma Ronghua et al., 2010; Zhu Li et al., 2013), which i...

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Application Information

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IPC IPC(8): G06T7/40
CPCG06T7/40G06T2207/10032G06T2207/30181
Inventor 张玉超马荣华段洪涛李晶
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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