Optimal lake‐marsh pattern determination in lake‐marsh systems based on the eco‐hydrological processes management

It was not until the late Middle Ages that the sea penetrated far into the interior of The Netherlands, thus flooding three quarters of a million hectares of land. Since then half a million hectares have been reclaimed from the sea. The Dutch Government chose to preserve the remaining quarter of a million hectares of shallow sea with mudflats of the Waddensea as a nature reserve. The management objectives are at one hand to preserve all characteristic habitats and species with a minimal interference by human activities in geomorphological and hydrological processes, and at the other hand to guarantee the safety against the sea of the inhabitants of the adjacent mainland and islands and to facilitate certain economic and recreational uses of the Waddensea without jeopardizing the natural qualities. These objectives are being elaborated in managementplans.

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A STELLA-Based Model to Simultaneously Predict Hydrological Processes, N Uptake and Biomass Production in a Eucalyptus Plantation

Forests ◽

10.3390/f12050515 ◽

2021 ◽

Vol 12 (5) ◽

pp. 515

Author(s):

Ying Ouyang ◽

Gary Feng ◽

Heidi Renninger ◽

Theodor D. Leininger ◽

Prem Parajuli ◽

...

Keyword(s):

Water Use ◽

Biomass Production ◽

Net Primary Production ◽

N Uptake ◽

Hydrological Processes ◽

Modeling Tools ◽

Eucalyptus Plantation ◽

Simulation Scenario ◽

Use Efficiency ◽

N Use

Eucalyptus is one of the fastest growing hardwoods for bioenergy production. Currently, few modeling tools exist to simultaneously estimate soil hydrological processes, nitrogen (N) uptake, and biomass production in a eucalyptus plantation. In this study, a STELLA (Structural Thinking and Experiential Learning Laboratory with Animation)-based model was developed to meet this need. After the model calibration and validation, a simulation scenario was developed to assess eucalyptus (E. grandis × urophylla) annual net primary production (ANPP), woody biomass production (WBP), water use efficiency (WUE), and N use efficiency (NUE) for a simulation period of 20 years. Simulation results showed that a typical annual variation pattern was predicted for water use, N uptake, and ANPP, increasing from spring to fall and decreasing from fall to the following winter. Overall, the average NUE during the growth stage was 700 kg/kg. To produce 1000 kg eucalyptus biomass, it required 114.84 m3 of water and 0.92 kg of N. This study suggests that the STELLA-based model is a useful tool to estimate ANPP, WBP, WUE, and NUE in a eucalyptus plantation.

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Women Advancing Research on Hydrological Processes: Preface

Hydrological Processes ◽

10.1002/hyp.14267 ◽

2021 ◽

Author(s):

Doerthe Tetzlaff ◽

Elizabeth Boyer ◽

Tanya Doody ◽

Anne Jefferson ◽

Annalisa Molini

Keyword(s):

Hydrological Processes

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Impacts of land use and land cover changes on hydrological processes and sediment yield determined using the SWAT model

International Journal of Sediment Research ◽

10.1016/j.ijsrc.2021.04.002 ◽

2021 ◽

Author(s):

Edivaldo Afonso de Oliveira Serrão ◽

Madson Tavares Silva ◽

Thomás Rocha Ferreira ◽

Lorena Conceição Paiva de Ataide ◽

Cleber Assis dos Santos ◽

...

Keyword(s):

Land Use ◽

Land Cover ◽

Sediment Yield ◽

Swat Model ◽

Hydrological Processes ◽

Land Cover Changes

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Groundwater salinity variation in Upazila Assasuni (southwestern Bangladesh), as steered by surface clay layer thickness, relative elevation and present-day land use

Hydrology and Earth System Sciences ◽

10.5194/hess-23-1431-2019 ◽

2019 ◽

Vol 23 (3) ◽

pp. 1431-1451 ◽

Cited By ~ 5

Author(s):

Floris Loys Naus ◽

Paul Schot ◽

Koos Groen ◽

Kazi Matin Ahmed ◽

Jasper Griffioen

Keyword(s):

Land Use ◽

Drinking Water ◽

Coastal Region ◽

Shallow Depth ◽

Hydrological Processes ◽

Groundwater Salinity ◽

Clay Layer ◽

Fresh Groundwater ◽

Salinity Variation ◽

Clay Layers

Abstract. In the southwestern coastal region of Bangladesh, options for drinking water are limited by groundwater salinity. To protect and improve the drinking water supply, the large variation in groundwater salinity needs to be better understood. This study identifies the palaeo and present-day hydrological processes and their geographical or geological controls that determine variation in groundwater salinity in Upazila Assasuni in southwestern Bangladesh. Our approach involved three steps: a geological reconstruction, based on the literature; fieldwork to collect high-density hydrological and lithological data; and data processing to link the collected data to the geological reconstruction in order to infer the evolution of the groundwater salinity in the study area. Groundwater freshening and salinization patterns were deduced using PHREEQC cation exchange simulations and isotope data were used to derive relevant hydrological processes and water sources. We found that the factor steering the relative importance of palaeo and present-day hydrogeological conditions was the thickness of the Holocene surface clay layer. The groundwater in aquifers under thick surface clay layers is controlled by the palaeohydrological conditions prevailing when the aquifers were buried. The groundwater in aquifers under thin surface clay layers is affected by present-day processes, which vary depending on present-day surface elevation. Slightly higher-lying areas are recharged by rain and rainfed ponds and therefore have fresh groundwater at shallow depth. In contrast, the lower-lying areas with a thin surface clay layer have brackish–saline groundwater at shallow depth because of flooding by marine-influenced water, subsequent infiltration and salinization. Recently, aquaculture ponds in areas with a thin surface clay layer have increased the salinity in the underlying shallow aquifers. We hypothesize that to understand and predict shallow groundwater salinity variation in southwestern Bangladesh, the relative elevation and land use can be used as a first estimate in areas with a thin surface clay layer, while knowledge of palaeohydrogeological conditions is needed in areas with a thick surface clay layer.

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Study of climate change effects on hydrological processes in Siminehroud and Zarrinehroud watersheds northwest of Iran

Earth Science Informatics ◽

10.1007/s12145-021-00598-2 ◽

2021 ◽

Author(s):

Parvaneh Mahmudi ◽

Baharak Motamedvaziri ◽

Majid Hosseini ◽

Hasan Ahmadi ◽

Ata Amini

Keyword(s):

Climate Change ◽

Hydrological Processes ◽

Climate Change Effects ◽

Northwest Of Iran

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Impact of Climate and Land Use/Land Cover Change on the Water Resources of a Tropical Inland Valley Catchment in Uganda, East Africa

Climate ◽

10.3390/cli8070083 ◽

2020 ◽

Vol 8 (7) ◽

pp. 83

Author(s):

Geofrey Gabiri ◽

Bernd Diekkrüger ◽

Kristian Näschen ◽

Constanze Leemhuis ◽

Roderick van der Linden ◽

...

Keyword(s):

Climate Change ◽

Land Use ◽

Water Resources ◽

Land Cover ◽

Rainy Season ◽

Hydrological Processes ◽

Land Use Land Cover ◽

Lulc Change ◽

Inland Valley ◽

Headwater Catchment

The impact of climate and land use/land cover (LULC) change continues to threaten water resources availability for the agriculturally used inland valley wetlands and their catchments in East Africa. This study assessed climate and LULC change impacts on the hydrological processes of a tropical headwater inland valley catchment in Uganda. The hydrological model Soil and Water Assessment Tool (SWAT) was applied to analyze climate and LULC change impacts on the hydrological processes. An ensemble of six regional climate models (RCMs) from the Coordinated Regional Downscaling Experiment for two Representative Concentration Pathways (RCPs), RCP4.5 and RCP8.5, were used for climate change assessment for historical (1976–2005) and future climate (2021–2050). Four LULC scenarios defined as exploitation, total conservation, slope conservation, and protection of headwater catchment were considered. The results indicate an increase in precipitation by 7.4% and 21.8% of the annual averages in the future under RCP4.5 and RCP8.5, respectively. Future wet conditions are more pronounced in the short rainy season than in the long rainy season. Flooding intensity is likely to increase during the rainy season with low flows more pronounced in the dry season. Increases in future annual averages of water yield (29.0% and 42.7% under RCP4.5 and RCP8.5, respectively) and surface runoff (37.6% and 51.8% under RCP4.5 and RCP8.5, respectively) relative to the historical simulations are projected. LULC and climate change individually will cause changes in the inland valley hydrological processes, but more pronounced changes are expected if the drivers are combined, although LULC changes will have a dominant influence. Adoption of total conservation, slope conservation and protection of headwater catchment LULC scenarios will significantly reduce climate change impacts on water resources in the inland valley. Thus, if sustainable climate-smart management practices are adopted, the availability of water resources for human consumption and agricultural production will increase.

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