A stochastic dynamic model to assess land use change scenarios on the ecological status of fluvial water bodies under the Water Framework Directive

2016 ◽  
Vol 565 ◽  
pp. 427-439 ◽  
Author(s):  
Samantha Jane Hughes ◽  
João Alexandre Cabral ◽  
Rita Bastos ◽  
Rui Cortes ◽  
Joana Vicente ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Dynamic Model ◽  
Water Framework Directive ◽  
Ecological Status ◽  
Water Bodies ◽  
Stochastic Dynamic

scholarly journals Land-use and agriculture in Denmark around year 1900 and the quest for EU Water Framework Directive reference conditions in coastal waters

AMBIO ◽  
2021 ◽  
Author(s):  
Bent T. Christensen ◽  
Birger F. Pedersen ◽  
Jørgen E. Olesen ◽  
Jørgen Eriksen
Keyword(s):  
Land Use ◽  
Water Framework Directive ◽  
Coastal Waters ◽  
Root Zone ◽  
Reference Conditions ◽  
Ecological Status ◽  
Agricultural Activity ◽  
Eu Water Framework Directive ◽  
Alternative Approach ◽  
The Eu

AbstractThe EU Water Framework Directive (WFD) aims to protect the ecological status of coastal waters. To establish acceptable boundaries between good and moderate ecological status, the WFD calls for reference conditions practically undisturbed by human impact. For Denmark, the nitrogen (N) concentrations present around year 1900 have been suggested to represent reference conditions. As the N load of coastal waters relates closely to runoff from land, any reduction in load links to agricultural activity. We challenge the current use of historical N balances to establish WFD reference conditions and initiate an alternative approach based on parish-level land-use statistics collected 1896/1900 and N concentrations in root zone percolates from experiments with year 1900-relevant management. This approach may be more widely applicable for landscapes with detailed historic information on agricultural activity. Using this approach, we find an average N concentration in root zone percolates that is close to that of current agriculture. Thus, considering Danish coastal waters to be practically unaffected by human activity around year 1900 remains futile as 75% of the land area was subject to agricultural activity with a substantial potential for N loss to the environment. It appears unlikely that the ecological state of coastal waters around year 1900 may serve as WFD reference condition.

Assessing the Impacts of Temperature, Precipitation and Land Use Change on Open Water Bodies of Middle Ghaghara River Basin

2019 ◽  
pp. 185-202
Author(s):  
Rajesh Kumar ◽  
Prem Chandra Pandey ◽  
Pyarimohan Maharana ◽  
Hemant Gautam ◽  
Vijendra Kumar Pandey
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
River Basin ◽  
Open Water ◽  
Water Bodies

scholarly journals Land Use Change in Coastal Cities during the Rapid Urbanization Period from 1990 to 2016: A Case Study in Ningbo City, China

2019 ◽  
Vol 11 (7) ◽  
pp. 2122 ◽  
Author(s):  
Chao Zhang ◽  
Shuai Zhong ◽  
Xue Wang ◽  
Lei Shen ◽  
Litao Liu ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Agricultural Land ◽  
Rapid Expansion ◽  
Water Bodies ◽  
City Center ◽  
Site Specific ◽  
Construction Land ◽  
Coastal Cities

Coastal cities have been experiencing tremendous land use changes worldwide. Studies on the consequences of land use change in coastal cities have provided helpful information for spatial regulations and have attracted increased attention. Changes in forests and water bodies, however, have rarely been investigated, challenging the formation of a holistic pattern of land use change. In this study, we selected Ningbo, China, as a case study area and analyzed its land use change from 1990 to 2016. Random forest (RF) classification was employed to derive land use information from Landsat images. Transition matrices and a distribution index (DI) were applied to identify the major types of land use transitions and their spatial variations by site-specific attributes. The results showed that the entire time period could be divided into two stages, based on the manifestations of land use change in Ningbo: 1990–2005 and 2005–2016. During 1990–2005, construction land expanded rapidly, mainly through the occupation of agricultural land and forest, while during 2005–2016, the main change trajectory turned out to be a small net change in construction land and a net increase in agricultural land sourced from construction land, forests, and water bodies. In terms of land use change by site-specific attributes, the rapid expansion of construction land around the municipal city center during 1990–2005 was restrained, and similar amounts of land conversion between construction and agricultural use occurred during 2005–2016. During the study period, areas undergoing land use change also showed trends of moving outward from the municipal city center and the county centers located adjacent to roads and the coastline and of moving up to hilly areas with steeper slopes and higher elevations. Protecting reclaimed agricultural land, improving the efficiency of construction land, and controlling forest conversion in hilly areas are suggested as spatial regulations in Ningbo city.

scholarly journals Temporal-Spatial Variations and Influencing Factor of Land Use Change in Xinjiang, Central Asia, from 1995 to 2015

2019 ◽  
Vol 11 (3) ◽  
pp. 696 ◽  
Author(s):  
Qun Liu ◽  
Zhaoping Yang ◽  
Cuirong Wang ◽  
Fang Han
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Central Asia ◽  
Influencing Factor ◽  
Land Use Changes ◽  
Spatial Variations ◽  
Water Bodies ◽  
Unused Land ◽  
Basin Scale ◽  
The Impact

In this study, we analyzed the temporal-spatial variations of the characteristics of land use change in central Asia over the past two decades. This was conducted using four indicators (change rate, equilibrium extent, dynamic index, and transfer direction) and a multi-scale correlation analysis method, which explained the impact of recent environmental transformations on land use changes. The results indicated that the integrated dynamic degree of land use increased by 2.2% from 1995 to 2015. The areas of cropland, water bodies, and artificial land increased, with rates of 1047 km2/a, 39 km2/a, and 129 km2/a, respectively. On the other hand, the areas of forest, grassland, and unused land decreased, with rates of 54 km2/a, 803 km2/a, and 359 km2/a, respectively. There were significant increases in cropland and water bodies from 1995 to 2005, while the amount of artificial land significantly increased from 2005 to 2015. The increased areas of cropland in Xinjiang were mainly converted from grassland and unused land from 1995 to 2015, while the artificial land increase was mainly a result of the conversion from cropland, grassland, and unused land. The area of cropland rapidly expanded in south Xinjiang, which has led to centroid position to move cropland in Xinjiang in a southwest direction. Economic development and the rapid growth of population size are the main factors responsible for the cropland increases in Xinjiang. Runoff variations have a key impact on cropland changes at the river basin scale, as seen in three typical river basins.

Groundwater recharge in suburban areas of Hanoi, Vietnam: effect of decreasing surface-water bodies and land-use change

2017 ◽  
Vol 25 (3) ◽  
pp. 727-742 ◽  
Author(s):  
Keisuke Kuroda ◽  
Takeshi Hayashi ◽  
An Thuan Do ◽  
Vu Duc Canh ◽  
Tran Thi Viet Nga ◽  
...  
Keyword(s):  
Land Use ◽  
Surface Water ◽  
Land Use Change ◽  
Groundwater Recharge ◽  
Water Bodies ◽  
Suburban Areas ◽  
Surface Water Bodies

scholarly journals Benthic Diatoms in River Biomonitoring—Present and Future Perspectives within the Water Framework Directive

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 478
Author(s):  
Andreas Masouras ◽  
Ioannis Karaouzas ◽  
Elias Dimitriou ◽  
George Tsirtsis ◽  
Evangelia Smeti
Keyword(s):  
Water Framework Directive ◽  
Ecological Status ◽  
Organic Pollution ◽  
Water Bodies ◽  
Benthic Diatoms ◽  
Quality Indices ◽  
Eu Member States ◽  
Advantages And Disadvantages ◽  
Different Types ◽  
Quality Assessments

The European Water Framework Directive 2000/60/EC (WFD) has been implemented over the past 20 years, using physicochemical, biological and hydromorphological elements to assess the ecological status of surface waters. Benthic diatoms (i.e., phytobenthos) are one of the most common biological quality elements (BQEs) used in surface water monitoring and are particularly successful in detecting eutrophication, organic pollution and acidification. Herein, we reviewed their implementation in river biomonitoring for the purposes of the WFD, highlighting their advantages and disadvantages over other BQEs, and we discuss recent advances that could be applied in future biomonitoring. Until now, phytobenthos have been intercalibrated by the vast majority (26 out of 28) of EU Member States (MS) in 54% of the total water bodies assessed and was the most commonly used BQE after benthic invertebrates (85% of water bodies), followed by fish (53%), macrophytes (27%) and phytoplankton (4%). To meet the WFD demands, numerous taxonomy-based quality indices have been developed among MS, presenting, however, uncertainties possibly related to species biogeography. Recent development of different types of quality indices (trait-based, DNA sequencing and predictive modeling) could provide more accurate results in biomonitoring, but should be validated and intercalibrated among MS before their wide application in water quality assessments.

scholarly journals The assessment of chemical and ecological status in the water bodies of Slocene and Age

2020 ◽  
Author(s):  
Kristine Ikauniece ◽  
◽  
Ainis Lagzdins ◽  
Keyword(s):  
Land Use ◽  
Ecological Status ◽  
Late Summer ◽  
Water Bodies ◽  
Small Rivers ◽  
Anthropogenic Factors ◽  
Land Use Patterns ◽  
River Waters ◽  
Late Autumn ◽  
Use Patterns

Small rivers are important in terms of water quantity and quality as these rivers collect and deliver water to medium and large rivers downstream. Due to low water flow and high connectivity to adjacent land, small rivers are highly vulnerable to changes caused by natural and anthropogenic factors. This paper aims to assess the chemical and ecological quality of two small rivers including the Slocene and Age as related to dominant land use cover in the contributing area of these water bodies. The effects of land-use patterns and concentrations of chemical substances TN, NO3 --N, NH4 +-N, TP and PO4 2--P in river waters will be determined. The highest concentration of total nitrogen (TN) as measured in the Slocene river was 21 mg L-1 in spring, while the lowest concentration of TN was 0.86 mg L-1 in autumn. The highest concentration of total phosphorus (TP) in the Slocene river was 0.14 mg L-1 in late summer, the lowest was 0.03 mg L-1 in late autumn. Similarly, in the Age river, the highest concentration of TN was 4.90 mg L-1 in spring, while TN the lowest concentration of TN was 0.51 mg L-1 in late autumn. The highest concentration of TP in the Age river was 0.3 mg L-1 in summer, while the lowest 0.05 mg L-1 in autumn.

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