Vessel anomalies in Quercus macrocarpa tree rings associated with recent floods along the Red River of the North, United States

2013 ◽  
Vol 49 (1) ◽  
pp. 630-634 ◽  
Author(s):  
Erika L. Wertz ◽  
Scott St. George ◽  
Joseph D. Zeleznik
Keyword(s):  
United States ◽  
Tree Rings ◽  
Red River ◽  
Quercus Macrocarpa ◽  
The North

Hydroclimatic Change in Southern Manitoba Since A.D. 1409 Inferred from Tree Rings

2002 ◽  
Vol 58 (2) ◽  
pp. 103-111 ◽  
Author(s):  
Scott St. George ◽  
Erik Nielsen
Keyword(s):  
River Basin ◽  
Great Plains ◽  
Red River ◽  
Tree Ring Chronology ◽  
Quercus Macrocarpa ◽  
The North ◽  
Red River Basin ◽  
Bur Oak ◽  
Dry Conditions ◽  
Hydroclimatic Change

AbstractA record of estimated annual (prior August to current July) precipitation derived from a regional bur oak (Quercus macrocarpa Michx.) tree-ring chronology indicates that southern Manitoba's hydroclimate has been relatively stable over the last 200 yr. Although this stability was interrupted briefly by pronounced wet intervals in the late A.D. 1820s and 1850s, hydroclimatic conditions since permanent Euro-Canadian settlement were much less variable and persistent than those prior to A.D. 1790. The reconstruction indicates that the Red River basin experienced extremely dry conditions between A.D. 1670 and 1775, with below-normal precipitation occurring approximately 2 years out of 3. Annual precipitation was estimated at more than two standard deviations below the mean during A.D. 1477, 1485, 1556, 1595, 1612, 1644, 1661, 1743, 1900, and 1980. Comparisons with limnological records from North Dakota and Minnesota suggest that multidecadal fluctuations in regional hydroclimate have been remarkably coherent across the northeastern Great Plains during the last 600 yr. However, individual dry years in the Red River basin were usually associated with larger scale drought across much of the North American interior.

The need for paleoflood investigations on the American reach of the Red River of the North

The Holocene ◽  
2021 ◽  
pp. 095968362110605
Author(s):  
Scott St. George ◽  
Joseph Zeleznik ◽  
Judith Avila ◽  
Matthew Schlauderaff
Keyword(s):  
United States ◽  
The United States ◽  
Flood Frequency ◽  
Red River ◽  
Past Century ◽  
Policy Makers ◽  
The Past ◽  
The North ◽  
Diversion Channel ◽  
History Of

Over the past century, the Red River of the North has been the least stationary river in the continental United States. In Canada, historical and paleoenvironmental evidence indicates severe floods were common during the early 1800s, with the record ce 1826 flood having an estimated peak discharge 50% higher than the second-most severe flood ever observed. Unfortunately, the recorded history of flooding upstream in the United States does not begin until seven decades after this event. If 1826 was an equally exceptional flood on American reach of the river, then current flood-frequency curves for the river underestimate significantly the risks posed by future flooding. Alternatively, if the American stretch did not produce a major flood in 1826, then the recent spate of flooding that has occurred over the past two decades is exceptional within the context of the past 200 years. Communities in the Fargo-Moorhead metropolitan area are building a 58-km long, $2.75 billion (USD) diversion channel that would redirect floodwaters westward around the two cities before returning it to the main channel. Because this and other infrastructure in North Dakota and Minnesota is intended to provide protection against low-probability, high-magnitude floods, new paleoflood investigations in the region would help local, state, and federal policy-makers better understand the true flood threats posed by the Red River of the North.

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
United States ◽  
Ictalurus Punctatus ◽  
Flood Control ◽  
Fish Assemblages ◽  
Large River ◽  
Lake Sturgeon ◽  
Red River ◽  
Wetland Drainage ◽  
The North ◽  
Central Canada

<em>Abstract.</em>—The Red River of the North basin (RRNB) has an area of about 287,000 square kilometers of the upper Midwestern United States and south-central Canada. The river forms the North Dakota–Minnesota boundary and flows into Lake Winnipeg, Manitoba, and then, via the Nelson River, into Hudson Bay. While the Red River main stem remains a sinuous stream similar to early descriptions, the river’s watershed has been altered dramatically by intensive agriculture, wetland drainage, channelization of tributary streams, and dam construction. Early land surveys described a landscape largely covered by prairie and wetlands. However, thousands of kilometers of ditches have been excavated to drain wetlands for agriculture in the United States in the late 1800s to the 1920s, and continuing, in Canada, to the present. Over 500 dams have blocked access to critical spawning habitat in the basin starting in the late 1800s. Also, during the mid-1900s, many of the tributaries were channelized, causing the loss of several thousand stream kilometers. While much of RRNB’s fish assemblage remains similar to earliest historical records, the loss of the lake sturgeon <em>Acipenser fulvescens </em>is a notable change resulting from habitat loss and fragmentation, and overfishing. Additional localized extirpations of channel catfish <em>Ictalurus punctatus</em>, several redhorse <em>Moxostoma </em>species, sauger <em>Sander canadensis</em>, and other migratory fishes have occurred upstream of dams on several tributaries. Presently, efforts are underway to restore migratory pathways through dam removal, conversion of dams to rapids, and construction of nature-like fishways. Concurrently, lake sturgeon is being reintroduced in the hope that restored access to historic spawning areas will allow reestablishment of the species. Proposed construction of new flood control dams may undermine these efforts.

Preliminary results of the study on the reasons of the Hai Hau erosion phenomenon

2007 ◽  
Vol 29 (3) ◽  
pp. 415-426
Author(s):  
Pham Van Ninh ◽  
Phan Ngoc Vinh ◽  
Nguyen Manh Hung ◽  
Dinh Van Manh
Keyword(s):  
Mathematical Modeling ◽  
Historical Data ◽  
Middle Part ◽  
Red River ◽  
Erosion Process ◽  
Red River Delta ◽  
The North ◽  
Severe Erosion ◽  
North And South ◽  
Very High

Overall the evolution process of the Red River Delta based on the maps and historical data resulted in a fact that before the 20th century all the Nam Dinh coastline was attributed to accumulation. Then started the erosion process at Xuan Thuydistrict and from the period of 1935 - 1965 the most severe erosion was contributed in the stretch from Ha Lan to Hai Trieu, 1965 - 1990 in Hai Chinh - Hai Hoa, 1990 - 2005 in the middle part of Hai Chinh - Hai Thinh (Hai Hau district). The adjoining stretches were suffered from not severe erosion. At the same time, the Ba Lat mouth is advanced to the sea and to the North and South direction by the time with a very high rate.The first task of the mathematical modeling of coastal line evolution of Hai Hau is to evaluate this important historical marked periods e. g. to model the coastal line at the periods before 1900, 1935 - 1965; 1965 - 1990; 1990 - 2005. The tasks is very complicated and time and working labors consuming.In the paper, the primarily results of the above mentioned simulations (as waves, currents, sediments transports and bottom - coastal lines evolution) has been shown. Based on the obtained results, there is a strong correlation between the protrusion magnitude and the southward moving of the erosion areas.

Sign in / Sign up

Export Citation Format

Share Document