A management-oriented valuation method to determine ecological water requirement for wetlands in the Yellow River Delta of China

Cui, Baoshan; Tang, Na; Zhao, Xinsheng; Bai, Junhong

doi:10.1016/j.jnc.2009.01.003

Cited by 90 publications

(43 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Some studies (Cui et al, 2009a;Zhang et al, 2012) had found out that reasonable engineering projects could improve eco-system functions. The higher salt content in farmlands converted in the earlier period indicates that more engineering projects will be needed to improve soil salt content in the Yellow River delta.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Investigating marsh sediment dynamics and its driving factors in Yellow River delta for wetland restoration

Kang

Shao

et al. 2016

Ecological Engineering

View full text Add to dashboard Cite

a b s t r a c tThe wetlands of the Yellow River delta play important roles for Asian and west Pacific birds during migration. Marshes are the main component of wetlands in the delta, and their coverage area has experienced a decreasing trend for the last few decades. Wetland changes in the Yellow River delta have been analyzed in previous studies; however, those studies only partially analyzed the causes of the decline. Using statistical and spatial analysis based on observational data and remote sensing imagery for the period of 1986-2005, we found that the annual mean temperature and annual precipitation tended to increase, and the evapotranspiration and the moisture index tended to decrease. Consequently, these climate factors led to a significant decrease in river runoff, which resulted in decreased water supply for the marshes in the delta. A Wetland Restoration Project was launched in 1992, and it successfully conserved marshes within a relatively small area. However, the inadequate water supply still resulted in an overall decrease in marsh area over the entire study area. These results provide more insights into managing wetlands eco-restoration.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Many migratory bird species such as red-crowned cranes, storks, white-spoonbills, geese, and ducks stop to replenish their foods and energy in the wetlands of the delta, then fly to other Asian and western Pacific areas (Cui et al, 2009a;Li et al, 2011;Wang et al, 2014;Liu et al, 2015). Wetlands in the area are mainly composed of marshes.…”

Section: Introductionmentioning

confidence: 99%

Investigating marsh sediment dynamics and its driving factors in Yellow River delta for wetland restoration

Kang

Shao

et al. 2016

Ecological Engineering

View full text Add to dashboard Cite

show abstract

“…Generally, the modern Yellow River Delta is located from Wu Hao Zhuang (north) to Song Chun Rong Gou (south) (longitude 118.30~119.30 • E, latitude 37.05~38.20 • N) [51]. This area has a temperate monsoon climate; the annual mean temperature is 11.9 • C and the average precipitation is about 640 mm with 196 frostless days [22,52,53]. Because of the sedimentation in the Yellow River, the sediment builds and rebuilds the delta continuously.…”

Section: Study Areamentioning

confidence: 99%

Four Decades of Estuarine Wetland Changes in the Yellow River Delta Based on Landsat Observations Between 1973 and 2013

Zhu

Zhang

Huang

2018

Water

View full text Add to dashboard Cite

Yellow River Delta wetlands are essential for the migration of endangered birds and breeding. The wetlands, however, have been severely damaged during recent decades, partly due to the lack of wetland ecosystem protection by authorities. To have a better historical understanding of the spatio-temporal dynamics of the wetlands, this study aims to map and characterize patterns of the loss and degradation of wetlands in the Yellow River Delta using a time series of remotely sensed images (at nine points in time) based on object-based image analysis and knowledge transfer learning technology. Spatio-temporal analysis was conducted to document the long-term changes taking place in different wetlands over the four decades. The results showed that the Yellow River Delta wetlands have experienced significant changes between 1973 and 2013. The total area of wetlands has been reduced by 683.12 km 2 during the overall period and the trend of loss continues. However, the rates and trends of change for the different types of wetlands were not the same. The natural wetlands showed a statistically significant decrease in area during the overall period (36.04 km 2 ·year −1 ). Meanwhile, the artificial wetlands had the opposite trend and showed a statistically significant increase in area during the past four decades (18.96 km 2 ·year −1 ). According to the change characteristics revealed by the time series wetland classification maps, the evolution process of the Yellow River Delta wetlands could be divided into three stages: (1) From 1973From -1984, basically stable, but with little increase; (2) from 1984-1995, rapid loss; and (3) from 1995-2013, slow loss. The area of the wetlands reached a low point around 1995, and then with a little improvement, the regional wetlands entered a slow loss stage. It is believed that interference by human activities (e.g., urban construction, cropland creation, and oil exploitation) was the main reason for wetland degradation in the Yellow River Delta over the past four decades. Climate change also has long-term impacts on regional wetlands. In addition, due to the special geographical environment, the hydrological and sediment conditions and the location of the Yellow River mouth also have a significant influence on the evolution process of the wetlands.

show abstract

“…The Yellow River Delta (YRD) is one of the most active regions of landeocean interaction among the large river deltas in the world (Li et al, 2009;Cui et al, 2009a). In recent years, jointly influenced by global climate change and human activities, water of the Yellow River discharged into the Bohai Sea has been greatly reduced, and the frequency of complete drying or ephemeral flow of the downstream river channel has increased (Xie et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Some studies have documented environmental flows for wetlands or the effects of water table depth and soil salinity on vegetation (e.g. Sun et al, 2008Sun et al, , 2012Cui et al, 2009aCui et al, , 2010An et al, 2011;Wang et al, 2011), but little effort has been made to investigate vegetation response to freshwater inflow.…”

Section: Introductionmentioning

confidence: 99%

Vegetation dynamics and their response to freshwater inflow and climate variables in the Yellow River Delta, China

Jiang¹,

Fu²,

Wang³

2013

Quaternary International

View full text Add to dashboard Cite

a b s t r a c tBased on SPOT Vegetation NDVI data, streamflow data and meteorological data, the variation of vegetation cover, measured by the Normalized Difference Vegetation Index (NDVI), and its response to freshwater inflow, precipitation and temperature in the Yellow River Delta and its buffer zones have been investigated for the period 1998e2009. The results show that NDVI has a remarkable regional and seasonal difference. The farther from the Yellow River Channel and the nearer to the Bohai Sea Coastline, the smaller the NDVI value, as influenced by the interaction between freshwater and saltwater on vegetation. Seasonally, high NDVI values appear in summer (August) and low in spring (April). From 1998 to 2009, growing season NDVI significantly increases in the Yellow River Delta. Summer and autumn NDVI have a similar trend pattern to growing season NDVI, while spring NDVI significantly decreases. NDVI shows different strengths of correlation with freshwater inflow, precipitation and temperature respectively and these correlations vary in different seasons and months. Freshwater inflow is a key factor for vegetation dynamics and NDVI variation. Climate features play a dominant role in seasonal variation in vegetation cover. However, the impacts of freshwater inflow and climate variables on vegetation have been greatly modified by a range of human activities such as land use pattern and land use change as well as water diversion from the Yellow River. Overall, the results of this study can be helpful for decision-making of regional ecological protection and economic development.

show abstract

A management-oriented valuation method to determine ecological water requirement for wetlands in the Yellow River Delta of China

Cited by 90 publications

References 26 publications

Investigating marsh sediment dynamics and its driving factors in Yellow River delta for wetland restoration

Investigating marsh sediment dynamics and its driving factors in Yellow River delta for wetland restoration

Four Decades of Estuarine Wetland Changes in the Yellow River Delta Based on Landsat Observations Between 1973 and 2013

Vegetation dynamics and their response to freshwater inflow and climate variables in the Yellow River Delta, China

Contact Info

Product

Resources

About