کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8487876 1552064 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Roles of climate and agricultural practices in discharge changes in an agricultural watershed in Iowa
ترجمه فارسی عنوان
نقش آب و هوا و شیوه های کشاورزی در تغییرات تخلیه در یک حوضه کشاورزی در آیووا
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی
During the 20th and 21st centuries, discharge over this area has been changing on a number of temporal scales, from annual to decadal. An outstanding question is related to the contribution of changes in the climate system and in land use/land cover and agricultural practices in explaining changes in discharge. We address this question by developing statistical models to describe the changes in different parts of the discharge distribution. We use rainfall and harvested corn and soybean acreage to explain the observed stream flow variability. We focus on the Raccoon River at Van Meter, which is a 9000-km2 watershed with daily discharge measurements covering most of the 20th century up to the present. Our results indicate that rainfall variability is responsible for the majority of the changes observed in the discharge record, with changes in cultivated area affecting the discharge responses in different ways, depending on which part of the discharge distribution is considered. In particular, land use change exacerbates high discharge during heavy precipitation and low discharge during low precipitation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 188, 15 April 2014, Pages 204-211
نویسندگان
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