Long-term rainfall and streamflow records for north central England: putting the Environmental Change Network site at Moor House, Upper Teesdale, in context
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چکیده
Long-term rainfall and streamflow records for the Moor House National Nature Reserve and sites close by in the northern Permines are analysed in order to place observations made since 1991 as part of the UK Environmental Change Network (ECN) in context. Rainfall records for the Durham Observatory since 1880 and streamflow for the River Wear at Durham since 1958 provide a regional setting within which the upland records can be assessed. Since 1991, the most notable event has been the drought of the 1995 summer which followed one of the wettest winters on record. A strong tendency is noted for increased hydrological variability recently, with the contrast between winter and summer becoming more extreme, both for rainfall and runoff. Longues séries hydropluviométriques de la partie centrale du nord de l'Angleterre : le contexte du réseau de surveillance des modifications environnementales de Moor House, Upper Teesdale Résumé Les longues séries hydropluviométriques du Parc National de Moor House et de stations des Pennines septentrionales ont été analysées en vue de replacer dans leur contexte les observations réalisées depuis 1991 dans le cadre du réseau britannique de surveillance des modifications environnementales (ECN). Les enregistrements pluviométriques à l'observatoire de Durham remontant à 1880 et les débits de la rivière Wear à Durham depuis 1958 fournissent un cadre régional à l'intérieur duquel les observations réalisées sur les hautes terres peuvent être appréciées. Depuis 1991, l'événement le plus remarquable a été la sécheresse de l'été 1995 qui a suivi un des hivers les plus humides jamais observés. On a pu noter une forte tendance à l'accroissement de la variabilité hydrologique, le contraste entre été et hiver devenant plus important, qu'il s'agisse des pluies ou des débits.
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تاریخ انتشار 1998