Home Case Wetland Resources Dynamic Monitoring

Wetland Resources Dynamic Monitoring

2018-06-01 16:13:49

Challenges

The wetland is an important land resources and natural resources with various functions, which not only provides for human’s living but of enormous environmental functions and benefits in fields like flood control, runoff regulation, flood storage & drought prevention, pollution control, climate regulating, soil erosion control, water dredge & land reclaiming, as well as beautifying the environment, and thus is dubbed the “Kidney of the Earth”.

However, soaring population, irrational exploitation of wetlands and excessive exploitation of their biological resources all add to the decrease of natural wetlands. It is imperative to guard the valuable resources of the earth.

Given people can neither walk nor boat on a piece of wetland, the traditional investigation and monitoring methods are infeasible and low efficient. Moreover, incorrect or inconsistent information largely exists in the data or statistics collected through the traditional surveys.

A New Solution

RS images make it possible for us to objectively and accurately understand wetlands’ distribution in different periods; Maps of different periods could be made from those images of different time to foster understanding of their changes, degradation scales and the status quo of the damaged wetland eco-system. Meanwhile, the RS technique owns qualities of objectiveness, correction and accuracy, economic effectiveness in wetland resources investigation.

We selected the historical images of the Zhenlai County as an example for analyzing the evolution of the eco-system in the west part of the Jilin province after the rivers and lakes are connected. The time and spatial altering data collected by the RS detecting provides support for the recovery and protection of the wetlands ecosystems.

We’ve analyzed the distribution changes of the ecosystem of the Zhenlai County’s wetlands in 1994 and 2015.

The demonstration area is divided into 5 basic ecosystems including the farmland, wetland, saline-alkali, residential and water ones. Given the specialty and diversification of the systems, nonmalignant types as well as other types are distinguished according to whether they are conducive to eco-environment. When the statistics is conducted, the types are summarized separately while saline-alkali lands and salt marshes are combined.

Conclusions

  (1) In the 1990s, wetland ecosystems have had a sound overall development. For example, the eastern Nenjiang River has had abundant water flows; the south Yao’er River has had well-developed benches and reed wetlands; while in the middle, intact lakes and ponds are scattered with lavish water plants but also alkali patches and developed salt marshes.

  (2) In 2015, there was a notable growth of arable lands and saline-alkali lands with increasing residential areas, and reduced wetlands and waters. In the middle, lakes and ponds vanished for saline-alkali and arable lands, while rivers, lakes and other waters were connected and communicated at a larger extend.

  (3) There has been a remarkable decreasing of waters and wetlands areas while residential and saline-alkali ones have boosted during the past 20 years. An evident human interference can be traced along with decreased service performances of wetlands and more arable lands transformed from wetlands.

~Challenges

The wetland is an important land resources and natural resources with various functions, which not only provides for human’s living but of enormous environmental functions and benefits in fields like flood control, runoff regulation, flood storage & drought prevention, pollution control, climate regulating, soil erosion control, water dredge & land reclaiming, as well as beautifying the environment, and thus is dubbed the “Kidney of the Earth”.

However, soaring population, irrational exploitation of wetlands and excessive exploitation of their biological resources all add to the decrease of natural wetlands. It is imperative to guard the valuable resources of the earth.

Given people can neither walk nor boat on a piece of wetland, the traditional investigation and monitoring methods are infeasible and low efficient. Moreover, incorrect or inconsistent information largely exists in the data or statistics collected through the traditional surveys.

A New Solution

RS images make it possible for us to objectively and accurately understand wetlands’ distribution in different periods; Maps of different periods could be made from those images of different time to foster understanding of their changes, degradation scales and the status quo of the damaged wetland eco-system. Meanwhile, the RS technique owns qualities of objectiveness, correction and accuracy, economic effectiveness in wetland resources investigation.

We selected the historical images of the Zhenlai County as an example for analyzing the evolution of the eco-system in the west part of the Jilin province after the rivers and lakes are connected. The time and spatial altering data collected by the RS detecting provides support for the recovery and protection of the wetlands ecosystems.

We’ve analyzed the distribution changes of the ecosystem of the Zhenlai County’s wetlands in 1994 and 2015.

The demonstration area is divided into 5 basic ecosystems including the farmland, wetland, saline-alkali, residential and water ones. Given the specialty and diversification of the systems, nonmalignant types as well as other types are distinguished according to whether they are conducive to eco-environment. When the statistics is conducted, the types are summarized separately while saline-alkali lands and salt marshes are combined.

Conclusions

(1) In the 1990s, wetland ecosystems have had a sound overall development. For example, the eastern Nenjiang River has had abundant water flows; the south Yao’er River has had well-developed benches and reed wetlands; while in the middle, intact lakes and ponds are scattered with lavish water plants but also alkali patches and developed salt marshes.

(2) In 2015, there was a notable growth of arable lands and saline-alkali lands with increasing residential areas, and reduced wetlands and waters. In the middle, lakes and ponds vanished for saline-alkali and arable lands, while rivers, lakes and other waters were connected and communicated at a larger extend.

(3) There has been a remarkable decreasing of waters and wetlands areas while residential and saline-alkali ones have boosted during the past 20 years. An evident human interference can be traced along with decreased service performances of wetlands and more arable lands transformed from wetlands.