Dynamique de la rivière Poulvar et morphogenèse de la plaine de Tang-i Bulaghi (Fars, Iran) à l’Holocène. Premiers résultats

Rigot, Jean-Baptiste

doi:10.4000/geomorphologie.7813

Cited by 9 publications

(15 citation statements)

References 32 publications

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“…Higher river discharge in the Maharlou catchment fits well with other records that show a period of river alluviation in the Pulvar (Rigot 2010) and Kor (Kehl Fig. 5 Palaeohydrology reconstructed from Lake Maharlou proxies compared to records in southwest Asia, as a function of age (cal year BP).…”

Section: To 2000 Cal Year Bp (Period A): Enhanced Detrital Supply Dursupporting

confidence: 82%

“…A transitory increase in the detrital supply in Lake Maharlou between 1300 and 1100 cal year BP is concomitant with increased alluvial sediment deposition in the Persepolis Basin (Fig. 5i) that may reflect a short phase of more humid conditions (Rigot 2010).…”

Section: To Present (Period B): Increasing Aridification and More Lakmentioning

confidence: 99%

“…h Historical archives citing drought or famine in Iran (Frye 1984;Melville 1984;Daryaee 2014). i Geomorphic record of the Pulvar fluvial valley of the Persepolis basin, Iran (Rigot 2010). j Geomorphic record of the Central Iranian Plateau (Schmidt et al 2011).…”

Section: To 2000 Cal Year Bp (Period A): Enhanced Detrital Supply Durmentioning

confidence: 99%

“…Dune formation and dust events in the Arabian Peninsula (Goudie et al 2000;Lückge et al 2001) suggest that a more arid climate might be responsible for the extreme evaporation of Lake Maharlou. In the Persepolis Basin, soils developed on previously deposited terraces (Rigot 2010), also suggesting very low fluvial activity. Speleothem records from northern and southern Oman seem to also indicate several short periods of drought (Fleitmann et al 2007).…”

Section: To Present (Period B): Increasing Aridification and More Lakmentioning

confidence: 99%

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Late Holocene hydrology of Lake Maharlou, southwest Iran, inferred from high-resolution sedimentological and geochemical analyses

Brisset

Djamali²,

Bard

et al. 2018

J Paleolimnol

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Sedimentological (dry density, micro-facies analysis on thin-slides, X-ray diffraction, layer counting) and elemental analyses (X-ray fluorescence) of a 3.5-m-long sediment core (MAH-B) from saline Lake Maharlou (SW Iran) were used to infer hydrological changes over the last * 3800 years. The sediment consists of thin, alternating beds of evaporites (halite, gypsum), carbonates (calcite, aragonite) and detrital minerals (quartz, muscovite, chlorite). We interpret the data with respect to three main hydrologic conditions: (1) nearly complete desiccation of the lake, marked by frequent halite layers, (2) hypersaline conditions marked by gypsum abundance, (3) wet conditions, characterized by high river-borne terrigenous sediment input with high potassium content. Distinct flood layers indicate fluvial activity. From about 3800-2000 cal year BP, terrigenous sediment supply was high, with peaks at 3700-3650, 3500-3450, and 3400-3250 cal year BP. Evaporative conditions were not common. From ca. 2000 cal year BP to present, detrital minerals are less abundant, and the increase in gypsum abundance suggests drier climate with enhanced evaporation. Frequent desiccation events occurred from 1100 to 700 cal year BP. The late Holocene hydrology of Lake Maharlou corresponds well with records of dune formation and phases of river alluviation in Iran and the Arabian Peninsula, and with regional speleothem records. In addition to the influence of climate change on the lake hydrology, ancient humans modified water drainage in the catchment. Periods of subterranean tunnel (qanats) use correspond to dramatic shrinkage of the water body. We propose that climate changes drove longterm water shortages that were enhanced by anthropogenic activities, leading to more frequent desiccation of the lake during the last millennium.

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Section: To 2000 Cal Year Bp (Period A): Enhanced Detrital Supply Dursupporting

confidence: 82%

Section: To Present (Period B): Increasing Aridification and More Lakmentioning

confidence: 99%

Section: To 2000 Cal Year Bp (Period A): Enhanced Detrital Supply Durmentioning

confidence: 99%

Section: To Present (Period B): Increasing Aridification and More Lakmentioning

confidence: 99%

See 2 more Smart Citations

Late Holocene hydrology of Lake Maharlou, southwest Iran, inferred from high-resolution sedimentological and geochemical analyses

Brisset

Djamali²,

Bard

et al. 2018

J Paleolimnol

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“…Palustrine carbonate outcrops associated with former karstic springs were encountered at several localities around the Persepolis Basin in October 2012, while suitable archives for Quaternary paleoenvironmental studies were being sought. To our knowledge, no study has so far been devoted to the sedimentology of these deposits, and the only comprehensive geomorphological investigations in the basin have focused on the edaphic-sedimentary profiles formed around the Kur and Pulvar River systems in the more northwest and central parts of the basin (Kehl et al 2005(Kehl et al , 2009Rigot 2010;De Schacht et al 2012). Therefore, in light of the important scientific potential of these deposits (Alonso-Zarza 2003), we decided to locate and investigate these sediments, and the associated modern wetlands, throughout the basin in the southern Zagros Mountains.…”

Section: Introductionmentioning

confidence: 99%

Karstic spring wetlands of the Persepolis Basin, southwest Iran: unique sediment archives of Holocene environmental change and human impacts

Djamali

Gondet

Ashjari³

et al. 2018

Can. J. Earth Sci.

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Palustrine carbonates are frequently found with active and dried karstic springs in the foothills of the mountains bordering the Persepolis Basin, southwest Iran. A combination of geological conditions favours their formation, including (i) the presence of karstic limestone aquifers in the limbs of anticlines cut through by fault systems; (ii) very gentle slopes from the spring resurgence point towards the centre of the alluvial plain, creating a flat waterlogged area; and (iii) a semiarid climate with marked precipitation seasonality or significant fluctuations in water discharge and wetland water table. We suggest the term “anastomosing wetlands” or “anastomosing palustrine environments” to denote the studied karstic spring–fed carbonate wetlands, because of similarities with anastomosing river systems in aerial view. The common presence of extended anastomosing wetland carbonates in the Persepolis Basin and adjacent basins in the central and southern Zagros suggests that they can play an important role in the geological records of collision-related basin-and-range settings dominated by karstic limestones. Karstic spring wetlands are a main source of fresh water hosting a rich biodiversity, which attracts human communities, whose impact is visible in the archaeological material imbedded in the wetland stratigraphy. Fresh water availability, through these spring wetlands, partly explains why the semiarid Persepolis region was selected by successive civilizations, from Elamites to Persians until early Islamic entities, to establish regional centres throughout the period from the third millennium B.C. to the first millennium A.D. Only a few of these ecosystems have survived the intensive human activities of recent decades.

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The canal system of Ju-i Dokhtar: new insight into water management in the eastern part of the Pasargadae plain (Fars, Iran)

et al. 2020

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Within the territory of the ancient province of Persia, which corresponds approximately to the present-day region of Fars in southern Iran, numerous remains of hydraulic structures are known and reported. These have rarely benefitted from detailed studies, however, which results in functional uncertainties and unconfirmed chronological suggestions, including in particular hasty attributions to the Achaemenid period. The territory of the plain of Pasargadae, situated at the center of this province, was well suited to irrigated agriculture, exemplified by the famous gardens created in the capital of Cyrus in the first period of the Achaemenid Empire. As the region is situated in a mountainous and semi-arid environment, irrigation is necessary for regular agricultural production throughout the year. The region of Pasargadae contains many hydraulic features that are relatively well preserved. However, their dating and their functions still remain unclear, which has stimulated new research and examination of all the evidence concerning the hydraulics, using a combination of methods and approaches, including systematic regional mapping, photo-interpretation, precise topographic readings, and dating experimentation through OSL analyses. This article presents a synthesising study of the remains of the Ju-i Dokhtar canal and the dam of Sa'adatshahr, which is located at the outlet of the canal. These structures probably formed the backbone of a system of water exploitation, that included all of the south-east part of the plain of Pasargadae and the plain of Sa'adatshahr further downstream.

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Dynamique de la rivière Poulvar et morphogenèse de la plaine de Tang-i Bulaghi (Fars, Iran) à l’Holocène. Premiers résultats

Cited by 9 publications

References 32 publications

Late Holocene hydrology of Lake Maharlou, southwest Iran, inferred from high-resolution sedimentological and geochemical analyses

Late Holocene hydrology of Lake Maharlou, southwest Iran, inferred from high-resolution sedimentological and geochemical analyses

Karstic spring wetlands of the Persepolis Basin, southwest Iran: unique sediment archives of Holocene environmental change and human impacts

The canal system of Ju-i Dokhtar: new insight into water management in the eastern part of the Pasargadae plain (Fars, Iran)

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