Climate change also effect the flow regime of rivers. Hydromorphological condition of river also depend upon the flow regime, catchment geology, riparian zoning conditions like vegetation cover, river altered flow and sedimentation (due to climate change). The other events like floods or flash floods, fluvial erosion due to climate change also effect the hydromorphological condition of stream or rivers. The conditions also depend upon the water source contribution like glacial, snow pack or ground water.

Climate change also effect the flow regime of rivers. Hydromorphological condition of river also depend upon the flow regime, catchment geology, riparian zoning conditions like vegetation cover, river altered flow and sedimentation (due to climate change). The other events like floods or flash floods, fluvial erosion due to climate change also effect the hydromorphological condition of stream or rivers. The conditions also depend upon the water source contribution like glacial, snow pack or ground water.

Hi, Mariusz, the influence on my opinion is both direct (Salar Ali underlined main factors) and indirect (like building the roads closely near the river side or making "protecting walls or dams). Indirect influence makes the riparian system more sensitive for direct influence of water regime changes!

Some people in my country are thinking that banana will grow here due to climate changing. But my experience as I had been working in several local and State commissions due to influences of catastrophic floods on life of people in Zakarpattia (Transcarpathia) shows the trend of dis-balance of hydromorphology of rivers – from absolutely dry and shallow to catastrophically fast and with ruining consequences for local economy and infrastructure. this all happened during my life as I'm enough old to sea changes in practically three generations. People still do not understand that should get used to live in new circumstances, eg cannot built house closely near the river and to think that it will survey for 100 year! Or to clear the Carpathians forest and to think that its water redistribution ability will be the same...

Look, please,

Book Conclusion of the scientific commission on study of the caus...

Chapter Причини катастрофічних паводків у Закарпатті та перспективи ...

Andrey

Climate change does not affect all areas or regions equally. To a great extent, the bankfull event affects channel morphology, and this is about the 1.5 year storm approximately. If storms increase in frequency, intensity with higher flows, unconsolidated channels would eventually adjust in dimension to accommodate. If the normal bankfull flow depends on snow melt, and the snow pack is reduced, the annual bankfull flows may be substantially less, and over time, channels would constrain in dimension from vegetation encroachment. If climate change substantially alters the vegetation cover type or extent, that may be another path where erosion and sediment increase, which as mentioned, can contribute to channel morphological changes. Areas with potential instability experiencing more extreme events may also lead to landslides or earthflows which may alter downstream channel morphology. Some areas may experience more droughts and as well, more severe storms. In SW, USA, professor and geomorphologist Luna Leopold found more severe erosion during drought cycles due to loss in vegetation cover, than wet cycles when vegetation cover was best. There are about a dozen climate change models, and depending on location, the effects can vary substantially in forecasts and projections. To estimate potential issues on local or regional areas, it may be best to assemble a team which are knowledgeable about all areas mentioned, and identify high risk areas or conditions, and begin any needed baseline surveys.

One lesson perhaps learned in the TS Joaquin event in 2015 in SC, USA is will our stream and rainfall gauges be able to measure a millenial event? Would they become flooded or damaged? Might roads and dams affect and increase the severity of flood effects? Like climate change, some concerns needs to be directed to other factors to be sure as researchers, we accomodate our monitoring effort to include and measure extremes, perhaps even installing backup measures. As far as channel morphology change, more baseline surveys needed, with periodic updates, and including periodic LiDAR coverage, especially on dedicated watershed gauging and research areas can help detect morphological change.

yes i agree with you if you checked time series data of Rivers, you saw this change distinctly.

The impact of extreme events will also have a prominent role on the geomorphology of a river bed. And with climate change many regions will experience an increase of the intensity of extreme events.

Dear All I completely agree with you. Thank you at your interesting responses. My case study, is River Neisse, tributary of Odra river. In this case I used climate projection RCP group. After the downscaling I used the date to rainfall runoff model and I am predicting data till 2100. In this case discharge will be decrese average around 20%. This means that there will be a less flow to create the river morphology and river bank erosin. This may lead to a natural reduction of river condition beside anthropogenic impact. For many years I have been conducting studies on hydromorphological status of rivers in south-western Poland in the Odra basin. We have the most transformations in the riverbed concerne with agriculture and water powerplants. But now also we need to consider the climate change on surface waters. Changes in the climate of the air, sunshine and hence evaporation. In atmospheric precipitation, these trends can not be seen. But with the same water resources and increasing evaporation, availability of water resources will be less. In addition, the frequency of the extreme floods and droughts will increase. Therefore, these changes can change the current situation, dumping sites, erosion of the bed and banks of rivers.

There is good publication of JRC on the Danube basin with a lot of modeling results (Ad de Roo is one of authors). Hope it helps you .

The impact of climate change on hydromorphology is mainly related to the capacity of the structures and the phenomena responsible for constructing this morphology (geology, soil, topography, vegetation, erosion, rever regim, river bed characteristics, etc.) to withstand extreme events such as intense and abundant precipitation, long dry season or drought, flood, etc.

Article Eco-Hydrological Footprint of a River Basin in Western Ghats

For the Sahel many publications of Descroix et al about how the geomorphology of sahelian rivers have dramatically changed following the drought.